Question: who supported north korea in the korean war
[{'answer': 'China', 'provenance': [{'wikipedia_id': '16772', 'title': 'Korean War', 'start_paragraph_id': 1, 'start_character': 175, 'end_paragraph_id': 1, 'end_character': 180, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Soviet Union', 'provenance': [{'wikipedia_id': '16772', 'title': 'Korean War', 'start_paragraph_id': 1, 'start_character': 189, 'end_paragraph_id': 1, 'end_character': 201, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]