Question: when was the last time us won gold in hockey
[{'answer': '1980', 'provenance': [{'wikipedia_id': '945923', 'title': "United States men's national ice hockey team", 'start_paragraph_id': 2, 'start_character': 45, 'end_paragraph_id': 2, 'end_character': 49, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '945923', 'title': "United States men's national ice hockey team", 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 471, 'bleu_score': 0.575044888406633, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3191141850056189847}, 'section': 'Section::::Abstract.'}]}]