Question: who developed the great man theory of leadership
[{'answer': 'Scottish writer Thomas Carlyle'}, {'answer': 'Herbert Spencer', 'provenance': [{'wikipedia_id': '12223', 'title': 'Great man theory', 'start_paragraph_id': 11, 'start_character': 11, 'end_paragraph_id': 11, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Responses.\n'}]}]