Question: when was the first first person shooter game
[{'answer': '1973', 'provenance': [{'wikipedia_id': '25395149', 'title': 'First-person shooter', 'start_paragraph_id': 2, 'start_character': 104, 'end_paragraph_id': 2, 'end_character': 108, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]