Question: when was the last time india won olympic gold in hockey
[{'answer': '1980', 'provenance': [{'wikipedia_id': '6825785', 'title': "India men's national field hockey team", 'start_paragraph_id': 3, 'start_character': 34, 'end_paragraph_id': 3, 'end_character': 38, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]