Question: when was the song stacy's mom released
[{'answer': 'May 20 , 2003', 'provenance': [{'wikipedia_id': '444656', 'title': "Stacy's Mom", 'start_paragraph_id': 1, 'start_character': 191, 'end_paragraph_id': 1, 'end_character': 204, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '444656', 'title': "Stacy's Mom", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 684, 'bleu_score': 0.9625181433061291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11865339271079711357}, 'section': 'Section::::Abstract.'}]}]