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Error Case

Is it really a trigger??

1. In last year 's trial, the paper was convicted of defaming the government for publishing that trains running to and from southern Sudan were used to transport abducted women and children (Prediction: None, Answer: TRIGGER)

2. In Montreal , " Stop the War ," a coalition of more than 190 groups , said as many as 200,000 people turned out, though police refused to give a figure (Prediction: None, Answer: TRIGGER)

3. Counter-demonstrations in support of the US -led invasion of Iraq took place in some cities , with some 2,500 people turning out in Chicago (Prediction: None, Answer: TRIGGER)

4. The spokesman , reporting on the meeting, said Iraq called on the Security Council ``to rid the Middle East of weapons of mass destruction since Iraq has become free of them (Prediction: None, Answer: TRIGGER)

This is not a trigger?

1. The army said troops fired, and hit a boy , after a Palestinian youth threw a molotov cocktail (Prediction: TRIGGER, Answer: None)

2. In a village near the West Bank town of Qalqiliya , an 11-year-old Palestinian boy was killed during an exchange of gunfire (Prediction: TRIGGER, Answer: None)

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Oversampling

Trigger identification task

After oversampling, over fitting was occurred.

Before

              precision    recall  f1-score   support

        None       0.96      0.96      0.96      3470
     TRIGGER       0.48      0.51      0.49       253

   micro avg       0.93      0.93      0.93      3723
   macro avg       0.72      0.74      0.73      3723
weighted avg       0.93      0.93      0.93      3723

After

              precision    recall  f1-score   support

     TRIGGER       0.52      0.27      0.35       253
        None       0.95      0.98      0.96      3470

   micro avg       0.93      0.93      0.93      3723
   macro avg       0.73      0.63      0.66      3723
weighted avg       0.92      0.93      0.92      3723