Question: when did the drc gain independence from belgium
[{'answer': '30 June 1960', 'provenance': [{'wikipedia_id': '57808', 'title': 'Belgian Congo', 'start_paragraph_id': 79, 'start_character': 376, 'end_paragraph_id': 79, 'end_character': 388, 'bleu_score': 1.0, 'section': 'Section::::Toward independence.:Independence.\n'}]}]