Question: who was the killer in the movie i know what you did last summer
[{'answer': 'Ben Willis', 'provenance': [{'wikipedia_id': '255049', 'title': 'I Know What You Did Last Summer', 'start_paragraph_id': 11, 'start_character': 50, 'end_paragraph_id': 11, 'end_character': 60, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '255049', 'title': 'I Know What You Did Last Summer', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 963, 'bleu_score': 0.671958190051506, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9253039304667727807}, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '255049', 'title': 'I Know What You Did Last Summer', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9253039304667727807}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '657797', 'title': 'I Still Know What You Did Last Summer', 'section': 'Section::::Plot.\n', 'start_paragraph_id': 3, 'end_paragraph_id': 3, 'meta': {'evidence_span': ["She suffers from memories and nightmares of the accident and brutal murders of her friends by the vengeful fisherman, Ben Willis, from the summer before. Julie's roommate, Karla Wilson, receives a phone call from a local radio station and wins an all-expenses-paid vacation to the Bahamas for the Fourth of July weekend.", 'She suffers from memories and nightmares of the accident and brutal murders of her friends by the vengeful fisherman, Ben Willis, from the summer before.', 'She suffers from memories and nightmares of the accident and brutal murders of her friends by the vengeful fisherman, Ben Willis, from the summer before.']}}]}]