Question: who did the us back up in chinas civil war
[{'answer': 'Republic of China', 'provenance': [{'wikipedia_id': '54422', 'title': 'Chinese Civil War', 'start_paragraph_id': 1, 'start_character': 105, 'end_paragraph_id': 1, 'end_character': 122, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]