Task: Question Answering
Input (English): Slot Filling is an information extraction task which has become popular in the last years BIBREF3 . The task aims at extracting information about persons, organizations or geo-political entities from a large collection of news, web and discussion forum documents. 
 Question: What is the task of slot filling?
Output (English): The task aims at extracting information about persons, organizations or geo-political entities from a large collection of news, web and discussion forum documents.