Question: who runs a west coast offense in the nfl
[{'answer': 'wide receiver', 'provenance': [{'wikipedia_id': '638743', 'title': 'West Coast offense', 'start_paragraph_id': 11, 'start_character': 63, 'end_paragraph_id': 11, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::History and use of the term.:Vertical.\n'}]}, {'answer': 'tight ends', 'provenance': [{'wikipedia_id': '638743', 'title': 'West Coast offense', 'start_paragraph_id': 11, 'start_character': 82, 'end_paragraph_id': 11, 'end_character': 92, 'bleu_score': 1.0, 'section': 'Section::::History and use of the term.:Vertical.\n'}]}, {'answer': 'backs', 'provenance': [{'wikipedia_id': '638743', 'title': 'West Coast offense', 'start_paragraph_id': 11, 'start_character': 139, 'end_paragraph_id': 11, 'end_character': 144, 'bleu_score': 1.0, 'section': 'Section::::History and use of the term.:Vertical.\n'}]}, {'provenance': [{'wikipedia_id': '638743', 'title': 'West Coast offense', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 580, 'bleu_score': 0.9427836745142131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 44166438556701434}, 'section': 'Section::::History and use of the term.:Vertical.\n'}]}]