Hierarchical Annotation Event Extraction Method in Multiple Scenarios

Algorithm 1

Calculation of mask vector for specified event trigger.

Input: Sentence: ; Event type: list; event trigger;

Output: mask vector:

;

;

iflength of event type is 1then

 return the vector

end

other_trigger = list.pop()

fordo

 find which is the index of where is the minimal clause containing ;

 ifthen

  change 1 of to 0;

 end

end

return the vector