Question: who conducted a 300 mile march to sacramento california
[{'answer': 'Cesar Estrada Chavez', 'provenance': [{'wikipedia_id': '4976397', 'title': 'Delano grape strike', 'start_paragraph_id': 10, 'start_character': 18, 'end_paragraph_id': 10, 'end_character': 38, 'bleu_score': 1.0, 'section': 'Section::::Strike.\n'}]}, {'provenance': [{'wikipedia_id': '4976397', 'title': 'Delano grape strike', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 826, 'bleu_score': 0.961887266673727, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3979556215583127394}, 'section': 'Section::::Strike.\n'}]}]