Question: who found gold in the california gold rush
[{'answer': 'James W. Marshall', 'provenance': [{'wikipedia_id': '58296', 'title': 'California Gold Rush', 'start_paragraph_id': 1, 'start_character': 87, 'end_paragraph_id': 1, 'end_character': 104, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '58296', 'title': 'California Gold Rush', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 838, 'bleu_score': 0.739235681186274, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8645833813334759601}, 'section': 'Section::::Abstract.'}]}]