Question: what plate is the sierra nevada mountains on
[{'answer': 'Farallon Plate', 'provenance': [{'wikipedia_id': '50413', 'title': 'Sierra Nevada (U.S.)', 'start_paragraph_id': 31, 'start_character': 208, 'end_paragraph_id': 31, 'end_character': 222, 'bleu_score': 1.0, 'section': 'Section::::Geologic history.\n'}]}, {'provenance': [{'wikipedia_id': '50413', 'title': 'Sierra Nevada (U.S.)', 'start_paragraph_id': 31, 'start_character': 0, 'end_paragraph_id': 31, 'end_character': 641, 'bleu_score': 0.9822204502117851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15144659192148670077}, 'section': 'Section::::Geologic history.\n'}]}]