Question: who became the leader of the chinese communist party during the chinese long march
[{'answer': 'Mao Zedong', 'provenance': [{'wikipedia_id': '55074', 'title': 'Long March', 'start_paragraph_id': 1, 'start_character': 722, 'end_paragraph_id': 1, 'end_character': 732, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55074', 'title': 'Long March', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 997, 'bleu_score': 0.9881300380564421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8636467447387895038}, 'section': 'Section::::Abstract.'}]}]