Question: who launched the bardoli satyagraha on 4th february 1928
[{'answer': 'Vallabhbhai Patel', 'provenance': [{'wikipedia_id': '3626658', 'title': 'Bardoli Satyagraha', 'start_paragraph_id': 1, 'start_character': 226, 'end_paragraph_id': 1, 'end_character': 243, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3626658', 'title': 'Bardoli Satyagraha', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 341, 'bleu_score': 0.965203995518735, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4844525225188289419}, 'section': 'Section::::Abstract.'}]}]