Question: when did the first episode of big brother air
[{'answer': 'July 5 , 2000', 'provenance': [{'wikipedia_id': '3632935', 'title': 'Big Brother 1 (American season)', 'start_paragraph_id': 27, 'start_character': 29, 'end_paragraph_id': 27, 'end_character': 44, 'bleu_score': 1.0, 'section': 'Section::::Reception.:Ratings.\n'}]}, {'provenance': [{'wikipedia_id': '3632935', 'title': 'Big Brother 1 (American season)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 370, 'bleu_score': 0.970362113628587, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13291901260763230026}, 'section': 'Section::::Abstract.'}]}]