Question: when did the olympics first allow professional athletes
[{'answer': '1988', 'provenance': [{'wikipedia_id': '579830', 'title': 'Amateur sports', 'start_paragraph_id': 21, 'start_character': 1069, 'end_paragraph_id': 21, 'end_character': 1073, 'bleu_score': 1.0, 'section': 'Section::::Olympics.\n'}]}, {'provenance': [{'wikipedia_id': '579830', 'title': 'Amateur sports', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 1160, 'bleu_score': 0.9895557778849051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4902698518715810609}, 'section': 'Section::::Olympics.\n'}]}]