Question: when did the song summertime by will smith come out
[{'answer': 'May 1991', 'provenance': [{'wikipedia_id': '7206076', 'title': 'Summertime (DJ Jazzy Jeff & The Fresh Prince song)', 'start_paragraph_id': 1, 'start_character': 100, 'end_paragraph_id': 1, 'end_character': 108, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7206076', 'title': 'Summertime (DJ Jazzy Jeff & The Fresh Prince song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 548, 'bleu_score': 0.9553689348854101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7993659575996847217}, 'section': 'Section::::Abstract.'}]}]