Question: when did the amazing world of gumball first air
[{'answer': 'May 3 , 2011', 'provenance': [{'wikipedia_id': '31176241', 'title': 'List of The Amazing World of Gumball episodes', 'start_paragraph_id': 2, 'start_character': 870, 'end_paragraph_id': 2, 'end_character': 886, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31176241', 'title': 'List of The Amazing World of Gumball episodes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 888, 'bleu_score': 0.9297833301412001, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 704131160442760122}, 'section': 'Section::::Abstract.'}]}]