Task: Question Answering
Input (English): The seed lexicon consists of positive and negative predicates. If the predicate of an extracted event is in the seed lexicon and does not involve complex phenomena like negation, we assign the corresponding polarity score ($+1$ for positive events and $-1$ for negative events) to the event. It is a  
 Question: What is the seed lexicon?
Output (English): a vocabulary of positive and negative predicates that helps determine the polarity score of an event