Question: when did the soviet union take over afghanistan
[{'answer': 'December 28 , 1979', 'provenance': [{'wikipedia_id': '80197', 'title': 'Soviet–Afghan War', 'start_paragraph_id': 48, 'start_character': 669, 'end_paragraph_id': 48, 'end_character': 687, 'bleu_score': 1.0, 'section': 'Section::::Soviet operations 1979–1985.:Soviet intervention and coup.\n'}]}, {'provenance': [{'wikipedia_id': '80197', 'title': 'Soviet–Afghan War', 'start_paragraph_id': 48, 'start_character': 289, 'end_paragraph_id': 48, 'end_character': 686, 'bleu_score': 0.7721947901921791, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11749889036817565147}, 'section': 'Section::::Soviet operations 1979–1985.:Soviet intervention and coup.\n'}]}]