Question: who did the killing in the first friday the 13th movie
[{'answer': 'Mrs. Voorhees', 'provenance': [{'wikipedia_id': '168958', 'title': 'Friday the 13th (1980 film)', 'start_paragraph_id': 7, 'start_character': 594, 'end_paragraph_id': 7, 'end_character': 607, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}]