Question: when did korea became a colony of japan
[{'answer': '1910', 'provenance': [{'wikipedia_id': '341418', 'title': 'Korea under Japanese rule', 'start_paragraph_id': 1, 'start_character': 114, 'end_paragraph_id': 1, 'end_character': 118, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]