Question: who died in the expedition of lewis and clark
[{'answer': 'Charles Floyd', 'provenance': [{'wikipedia_id': '800057', 'title': 'Charles Floyd (explorer)', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '800057', 'title': 'Charles Floyd (explorer)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 439, 'bleu_score': 0.871895479546236, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5154589734108268448}, 'section': 'Section::::Abstract.'}]}]