Question: who was china fighting in world war 2
[{'answer': 'the Empire of Japan', 'provenance': [{'wikipedia_id': '69980', 'title': 'Second Sino-Japanese War', 'start_paragraph_id': 1, 'start_character': 104, 'end_paragraph_id': 1, 'end_character': 123, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '69980', 'title': 'Second Sino-Japanese War', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 451, 'bleu_score': 0.6278125525663211, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 812834517966951628}, 'section': 'Section::::Abstract.'}]}]