Question: when did india last won gold for hockey in the olympic games
[{'answer': '1980', 'provenance': [{'wikipedia_id': '3630757', 'title': 'India at the Olympics', 'start_paragraph_id': 3, 'start_character': 211, 'end_paragraph_id': 3, 'end_character': 215, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]