diff --git a/nctnlp/Pipfile.lock b/nctnlp/Pipfile.lock
index 6733ec3..31afc5f 100644
--- a/nctnlp/Pipfile.lock
+++ b/nctnlp/Pipfile.lock
@@ -34,10 +34,11 @@
         },
         "certifi": {
             "hashes": [
-                "sha256:1a4995114262bffbc2413b159f2a1a480c969de6e6eb13ee966d470af86af59c",
-                "sha256:719a74fb9e33b9bd44cc7f3a8d94bc35e4049deebe19ba7d8e108280cfd59830"
+                "sha256:84c85a9078b11105f04f3036a9482ae10e4621616db313fe045dd24743a0820d",
+                "sha256:fe86415d55e84719d75f8b69414f6438ac3547d2078ab91b67e779ef69378412"
             ],
-            "version": "==2020.12.5"
+            "markers": "python_version >= '3.6'",
+            "version": "==2022.6.15"
         },
         "chardet": {
             "hashes": [
@@ -63,49 +64,83 @@
         },
         "lxml": {
             "hashes": [
-                "sha256:0448576c148c129594d890265b1a83b9cd76fd1f0a6a04620753d9a6bcfd0a4d",
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-                "sha256:1471cee35eba321827d7d53d104e7b8c593ea3ad376aa2df89533ce8e1b24a01",
-                "sha256:2363c35637d2d9d6f26f60a208819e7eafc4305ce39dc1d5005eccc4593331c2",
-                "sha256:2e5cc908fe43fe1aa299e58046ad66981131a66aea3129aac7770c37f590a644",
-                "sha256:2e6fd1b8acd005bd71e6c94f30c055594bbd0aa02ef51a22bbfa961ab63b2d75",
-                "sha256:366cb750140f221523fa062d641393092813b81e15d0e25d9f7c6025f910ee80",
-                "sha256:42ebca24ba2a21065fb546f3e6bd0c58c3fe9ac298f3a320147029a4850f51a2",
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-                "sha256:535332fe9d00c3cd455bd3dd7d4bacab86e2d564bdf7606079160fa6251caacf",
-                "sha256:535f067002b0fd1a4e5296a8f1bf88193080ff992a195e66964ef2a6cfec5388",
-                "sha256:5be4a2e212bb6aa045e37f7d48e3e1e4b6fd259882ed5a00786f82e8c37ce77d",
-                "sha256:60a20bfc3bd234d54d49c388950195d23a5583d4108e1a1d47c9eef8d8c042b3",
-                "sha256:648914abafe67f11be7d93c1a546068f8eff3c5fa938e1f94509e4a5d682b2d8",
-                "sha256:681d75e1a38a69f1e64ab82fe4b1ed3fd758717bed735fb9aeaa124143f051af",
-                "sha256:68a5d77e440df94011214b7db907ec8f19e439507a70c958f750c18d88f995d2",
-                "sha256:69a63f83e88138ab7642d8f61418cf3180a4d8cd13995df87725cb8b893e950e",
-                "sha256:6e4183800f16f3679076dfa8abf2db3083919d7e30764a069fb66b2b9eff9939",
-                "sha256:6fd8d5903c2e53f49e99359b063df27fdf7acb89a52b6a12494208bf61345a03",
-                "sha256:791394449e98243839fa822a637177dd42a95f4883ad3dec2a0ce6ac99fb0a9d",
-                "sha256:7a7669ff50f41225ca5d6ee0a1ec8413f3a0d8aa2b109f86d540887b7ec0d72a",
-                "sha256:7e9eac1e526386df7c70ef253b792a0a12dd86d833b1d329e038c7a235dfceb5",
-                "sha256:7ee8af0b9f7de635c61cdd5b8534b76c52cd03536f29f51151b377f76e214a1a",
-                "sha256:8246f30ca34dc712ab07e51dc34fea883c00b7ccb0e614651e49da2c49a30711",
-                "sha256:8c88b599e226994ad4db29d93bc149aa1aff3dc3a4355dd5757569ba78632bdf",
-                "sha256:923963e989ffbceaa210ac37afc9b906acebe945d2723e9679b643513837b089",
-                "sha256:94d55bd03d8671686e3f012577d9caa5421a07286dd351dfef64791cf7c6c505",
-                "sha256:97db258793d193c7b62d4e2586c6ed98d51086e93f9a3af2b2034af01450a74b",
-                "sha256:a9d6bc8642e2c67db33f1247a77c53476f3a166e09067c0474facb045756087f",
-                "sha256:cd11c7e8d21af997ee8079037fff88f16fda188a9776eb4b81c7e4c9c0a7d7fc",
-                "sha256:d8d3d4713f0c28bdc6c806a278d998546e8efc3498949e3ace6e117462ac0a5e",
-                "sha256:e0bfe9bb028974a481410432dbe1b182e8191d5d40382e5b8ff39cdd2e5c5931",
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-                "sha256:f83d281bb2a6217cd806f4cf0ddded436790e66f393e124dfe9731f6b3fb9afe",
-                "sha256:fc37870d6716b137e80d19241d0e2cff7a7643b925dfa49b4c8ebd1295eb506e"
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+                "sha256:0538747a9d7827ce3e16a8fdd201a99e661c7dee3c96c885d8ecba3c35d1032c",
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+                "sha256:1423631e3d51008871299525b541413c9b6c6423593e89f9c4cfbe8460afc0a2",
+                "sha256:1436cf0063bba7888e43f1ba8d58824f085410ea2025befe81150aceb123e345",
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+                "sha256:21fb3d24ab430fc538a96e9fbb9b150029914805d551deeac7d7822f64631dfc",
+                "sha256:27e590352c76156f50f538dbcebd1925317a0f70540f7dc8c97d2931c595783a",
+                "sha256:287605bede6bd36e930577c5925fcea17cb30453d96a7b4c63c14a257118dbb9",
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+                "sha256:41fb58868b816c202e8881fd0f179a4644ce6e7cbbb248ef0283a34b73ec73bb",
+                "sha256:4780677767dd52b99f0af1f123bc2c22873d30b474aa0e2fc3fe5e02217687c7",
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+                "sha256:487c8e61d7acc50b8be82bda8c8d21d20e133c3cbf41bd8ad7eb1aaeb3f07c97",
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+                "sha256:4cfbe42c686f33944e12f45a27d25a492cc0e43e1dc1da5d6a87cbcaf2e95627",
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+                "sha256:4e285b5f2bf321fc0857b491b5028c5f276ec0c873b985d58d7748ece1d770dd",
+                "sha256:57e4d637258703d14171b54203fd6822fda218c6c2658a7d30816b10995f29f3",
+                "sha256:5974895115737a74a00b321e339b9c3f45c20275d226398ae79ac008d908bff7",
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+                "sha256:603a464c2e67d8a546ddaa206d98e3246e5db05594b97db844c2f0a1af37cf5b",
+                "sha256:6653071f4f9bac46fbc30f3c7838b0e9063ee335908c5d61fb7a4a86c8fd2036",
+                "sha256:6ca2264f341dd81e41f3fffecec6e446aa2121e0b8d026fb5130e02de1402785",
+                "sha256:6d279033bf614953c3fc4a0aa9ac33a21e8044ca72d4fa8b9273fe75359d5cca",
+                "sha256:6d949f53ad4fc7cf02c44d6678e7ff05ec5f5552b235b9e136bd52e9bf730b91",
+                "sha256:6daa662aba22ef3258934105be2dd9afa5bb45748f4f702a3b39a5bf53a1f4dc",
+                "sha256:6eafc048ea3f1b3c136c71a86db393be36b5b3d9c87b1c25204e7d397cee9536",
+                "sha256:830c88747dce8a3e7525defa68afd742b4580df6aa2fdd6f0855481e3994d391",
+                "sha256:86e92728ef3fc842c50a5cb1d5ba2bc66db7da08a7af53fb3da79e202d1b2cd3",
+                "sha256:8caf4d16b31961e964c62194ea3e26a0e9561cdf72eecb1781458b67ec83423d",
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+                "sha256:8f0a4d179c9a941eb80c3a63cdb495e539e064f8054230844dcf2fcb812b71d3",
+                "sha256:9232b09f5efee6a495a99ae6824881940d6447debe272ea400c02e3b68aad85d",
+                "sha256:927a9dd016d6033bc12e0bf5dee1dde140235fc8d0d51099353c76081c03dc29",
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+                "sha256:a60f90bba4c37962cbf210f0188ecca87daafdf60271f4c6948606e4dabf8785",
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+                "sha256:ae06c1e4bc60ee076292e582a7512f304abdf6c70db59b56745cca1684f875a4",
+                "sha256:b122a188cd292c4d2fcd78d04f863b789ef43aa129b233d7c9004de08693728b",
+                "sha256:b570da8cd0012f4af9fa76a5635cd31f707473e65a5a335b186069d5c7121ff2",
+                "sha256:bcaa1c495ce623966d9fc8a187da80082334236a2a1c7e141763ffaf7a405067",
+                "sha256:bd34f6d1810d9354dc7e35158aa6cc33456be7706df4420819af6ed966e85448",
+                "sha256:be9eb06489bc975c38706902cbc6888f39e946b81383abc2838d186f0e8b6a9d",
+                "sha256:c4b2e0559b68455c085fb0f6178e9752c4be3bba104d6e881eb5573b399d1eb2",
+                "sha256:c62e8dd9754b7debda0c5ba59d34509c4688f853588d75b53c3791983faa96fc",
+                "sha256:c852b1530083a620cb0de5f3cd6826f19862bafeaf77586f1aef326e49d95f0c",
+                "sha256:d9fc0bf3ff86c17348dfc5d322f627d78273eba545db865c3cd14b3f19e57fa5",
+                "sha256:dad7b164905d3e534883281c050180afcf1e230c3d4a54e8038aa5cfcf312b84",
+                "sha256:e5f66bdf0976ec667fc4594d2812a00b07ed14d1b44259d19a41ae3fff99f2b8",
+                "sha256:e8f0c9d65da595cfe91713bc1222af9ecabd37971762cb830dea2fc3b3bb2acf",
+                "sha256:edffbe3c510d8f4bf8640e02ca019e48a9b72357318383ca60e3330c23aaffc7",
+                "sha256:eea5d6443b093e1545ad0210e6cf27f920482bfcf5c77cdc8596aec73523bb7e",
+                "sha256:ef72013e20dd5ba86a8ae1aed7f56f31d3374189aa8b433e7b12ad182c0d2dfb",
+                "sha256:f05251bbc2145349b8d0b77c0d4e5f3b228418807b1ee27cefb11f69ed3d233b",
+                "sha256:f1be258c4d3dc609e654a1dc59d37b17d7fef05df912c01fc2e15eb43a9735f3",
+                "sha256:f9ced82717c7ec65a67667bb05865ffe38af0e835cdd78728f1209c8fffe0cad",
+                "sha256:fe17d10b97fdf58155f858606bddb4e037b805a60ae023c009f760d8361a4eb8",
+                "sha256:fe749b052bb7233fe5d072fcb549221a8cb1a16725c47c37e42b0b9cb3ff2c3f"
             ],
             "index": "pypi",
-            "version": "==4.6.2"
+            "version": "==4.9.1"
         },
         "nltk": {
             "hashes": [
+                "sha256:a08bdb4b8a1c13de16743068d9eb61c8c71c2e5d642e8e08205c528035843f82",
                 "sha256:bed45551259aa2101381bbdd5df37d44ca2669c5c3dad72439fa459b29137d94"
             ],
             "index": "pypi",
@@ -148,6 +183,7 @@
                 "sha256:dbd18bcf4889b720ba13a27ec2f2aac1981bd41203b3a3b27ba7a33f88ae4827",
                 "sha256:df609c82f18c5b9f6cb97271f03315ff0dbe481a2a02e56aeb1b1a985ce38e60"
             ],
+            "markers": "python_version >= '3.6'",
             "version": "==1.19.5"
         },
         "pandas": {
@@ -184,6 +220,7 @@
                 "sha256:0d946b79c56187fe139276d4c8ed612a27a616966c8b9779d6b79e2053587c8b",
                 "sha256:104790893b928d310aae8a955e0bdbaa442fb0ac0a33d1bbb0741c791a407778",
                 "sha256:15527ef218d95a8717486106553b0d54ff2641e795b65668754e17ab9ca6e381",
+                "sha256:164d02c7b1b5e27bf1da581a334762cf66df4a105d7faf46910cfc104ed255e4",
                 "sha256:1826527a0b032f6e20e7ac7f72d7c26dd476a5e5aa82c04aa1c7088a59fded7d",
                 "sha256:22e3aa4ce1c3eebc7f70f9ca7fd4ce1ea33e8bdb7b61996806cd312f08f84a3a",
                 "sha256:244e1101e9a48615b9a16cbd194f73c115fdfefc96894803158608115f703b26",
@@ -201,34 +238,39 @@
                 "sha256:5f8ed5934197a2d4b2087646e98de3e099a237099dcf498b9e38dd3465f74ef4",
                 "sha256:64b064124fcbc8eb04a155117dc4d9a336e3cda3f069958fbc44fe70c3c3d1e9",
                 "sha256:65958b8e4319f992e85dad59d8081888b97fcdbde5f0d14bc28f2848b92d3ef1",
+                "sha256:6be7f7302487c4d456ff8b58a1e31dd3e3c844189f5b892ef23310e0abf0db7b",
                 "sha256:7683428862e20c6a790c19e64f8ccf487f613fbc83d47e3d532df9c81668d451",
                 "sha256:78566d5570c75a127c2491e343dc006798a384f06be588fe9b0cbe5595711559",
                 "sha256:7d1cb00c093dbf1d0b16ccf123e79dee3b82608e4a2a88947695f0460eef13ff",
                 "sha256:8c74e2a9b594f7962c62cef7680a4cb92a96b4e6e3c2f970790da67cc0213a7e",
                 "sha256:8e60aa7699170f55f4b0f56ee6f8415229777ac7e4b4b1aa41fc61eec08c1f1d",
+                "sha256:90e40fbe59e3c223ac689b0537a5df1ab431c19741a2b42240b88cc672d083aa",
                 "sha256:9447b561529576d89d3bf973e5241a88cf76e45bd101963f5236888713dea774",
                 "sha256:970055bfeb0be373f2f5299a3db8432444bad3bc2f198753ee6c2a3a781e0959",
                 "sha256:a6344b8542e584e140dc3c651d68bde51270e79490aa9320f9e708f9b2c39bd5",
                 "sha256:ce309ca470d747b02ba6069d286a17b7df8e9c94d10d727d9cf3a64e51d85184",
                 "sha256:cfbd86ed4c2b2ac71bbdbcea6669bf295def7152e3722ddd9dda94ac7981f33d",
-                "sha256:d7929c513732dff093481f4a0954ed5ff16816365842136b17caa0b4992e49d3"
+                "sha256:d7929c513732dff093481f4a0954ed5ff16816365842136b17caa0b4992e49d3",
+                "sha256:e21180042aaa9589471c27f0cc1e38868abeaa59f988877fa129f3b5efdf6bfb",
+                "sha256:e98a9d2c590bc5a5e84f32430d2dc1fcc549d0a150a613bae6eadb5ef7c20465"
             ],
             "index": "pypi",
             "version": "==3.7.2"
         },
         "python-dateutil": {
             "hashes": [
-                "sha256:73ebfe9dbf22e832286dafa60473e4cd239f8592f699aa5adaf10050e6e1823c",
-                "sha256:75bb3f31ea686f1197762692a9ee6a7550b59fc6ca3a1f4b5d7e32fb98e2da2a"
+                "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86",
+                "sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9"
             ],
-            "version": "==2.8.1"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==2.8.2"
         },
         "pytz": {
             "hashes": [
-                "sha256:16962c5fb8db4a8f63a26646d8886e9d769b6c511543557bc84e9569fb9a9cb4",
-                "sha256:180befebb1927b16f6b57101720075a984c019ac16b1b7575673bea42c6c3da5"
+                "sha256:1e760e2fe6a8163bc0b3d9a19c4f84342afa0a2affebfaa84b01b978a02ecaa7",
+                "sha256:e68985985296d9a66a881eb3193b0906246245294a881e7c8afe623866ac6a5c"
             ],
-            "version": "==2020.5"
+            "version": "==2022.1"
         },
         "requests": {
             "hashes": [
@@ -300,20 +342,23 @@
                 "sha256:f87b39f4d69cf7d7529d7b1098cb712033b17ea7714aed831b95628f483fd012",
                 "sha256:fa789583fc94a7689b45834453fec095245c7e69c58561dc159b5d5277057e4c"
             ],
+            "markers": "python_version >= '3.6'",
             "version": "==1.5.4"
         },
         "six": {
             "hashes": [
-                "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259",
-                "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
+                "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
+                "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"
             ],
-            "version": "==1.15.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==1.16.0"
         },
         "urllib3": {
             "hashes": [
                 "sha256:2393a695cd12afedd0dcb26fe5d50d0cf248e5a66f75dbd89a3d4eb333a61af4",
                 "sha256:a637e5fae88995b256e3409dc4d52c2e2e0ba32c42a6365fee8bbd2238de3cfb"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3' and python_version < '4'",
             "version": "==1.24.3"
         },
         "webencodings": {