Question: when did monica and chandlers wedding episode air
[{'answer': 'May 17 , 2001', 'provenance': [{'wikipedia_id': '8086608', 'title': "The One with Monica and Chandler's Wedding", 'start_paragraph_id': 1, 'start_character': 126, 'end_paragraph_id': 1, 'end_character': 141, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8086608', 'title': "The One with Monica and Chandler's Wedding", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 486, 'bleu_score': 0.977397480575333, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7852317682542329432}, 'section': 'Section::::Abstract.'}]}]