Question: when did democratic republic of congo become independent
[{'answer': '1960', 'provenance': [{'wikipedia_id': '8022', 'title': 'History of the Democratic Republic of the Congo', 'start_paragraph_id': 5, 'start_character': 112, 'end_paragraph_id': 5, 'end_character': 116, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8022', 'title': 'History of the Democratic Republic of the Congo', 'start_paragraph_id': 5, 'start_character': 72, 'end_paragraph_id': 5, 'end_character': 1075, 'bleu_score': 0.8938717399936981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 170575113362453520}, 'section': 'Section::::Abstract.'}]}]