Question: when did world war 2 start in china
[{'answer': '1937', 'provenance': [{'wikipedia_id': '32927', 'title': 'World War II', 'start_paragraph_id': 2, 'start_character': 78, 'end_paragraph_id': 2, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '32927', 'title': 'World War II', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 1381, 'bleu_score': 0.6540929914551861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13341946378064242304}, 'section': 'Section::::Abstract.'}]}]