Question: when did a computer first beat a human at chess
[{'answer': 'late 1980s', 'provenance': [{'wikipedia_id': '16606350', 'title': 'Human–computer chess matches', 'start_paragraph_id': 2, 'start_character': 68, 'end_paragraph_id': 2, 'end_character': 78, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '16606350', 'title': 'Human–computer chess matches', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 275, 'bleu_score': 0.9569637990759251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2744287830649876227}, 'section': 'Section::::Abstract.'}]}]