Question: when was the first 16 and pregnant aired
[{'answer': 'June 11 , 2009', 'provenance': [{'wikipedia_id': '35960702', 'title': 'List of 16 and Pregnant episodes', 'start_paragraph_id': 1, 'start_character': 75, 'end_paragraph_id': 1, 'end_character': 89, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '35960702', 'title': 'List of 16 and Pregnant episodes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 843, 'bleu_score': 0.923611384037275, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11587194331128126796}, 'section': 'Section::::Abstract.'}]}]