Question: when did the show big brother first air
[{'answer': 'on July 5 , 2000', 'provenance': [{'wikipedia_id': '860916', 'title': 'Big Brother (American TV series)', 'start_paragraph_id': 6, 'start_character': 129, 'end_paragraph_id': 6, 'end_character': 145, 'bleu_score': 1.0, 'section': 'Section::::History.:Series.\n'}]}, {'provenance': [{'wikipedia_id': '860916', 'title': 'Big Brother (American TV series)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1030, 'bleu_score': 0.9884053071617651, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13987738431304274999}, 'section': 'Section::::Abstract.'}]}]