Question: which military action led to us boycott the 1980 olympics
[{'answer': 'Soviet invasion of Afghanistan', 'provenance': [{'wikipedia_id': '1958265', 'title': '1980 Summer Olympics boycott', 'start_paragraph_id': 1, 'start_character': 115, 'end_paragraph_id': 1, 'end_character': 145, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1958265', 'title': '1980 Summer Olympics boycott', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 283, 'bleu_score': 0.957870874785216, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16015511946271333667}, 'section': 'Section::::Abstract.'}]}]