Question: who is considered the leader of progressive education
[{'answer': 'John Dewey', 'provenance': [{'wikipedia_id': '10005', 'title': 'Progressive education', 'start_paragraph_id': 17, 'start_character': 187, 'end_paragraph_id': 17, 'end_character': 197, 'bleu_score': 1.0, 'section': 'Section::::Educational theory.\n'}]}, {'provenance': [{'wikipedia_id': '10005', 'title': 'Progressive education', 'start_paragraph_id': 33, 'start_character': 0, 'end_paragraph_id': 33, 'end_character': 1003, 'bleu_score': 0.9647750459185931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13800250448141282408}, 'section': 'Section::::Educational theory.:John Dewey.\n'}]}]