Question: when did the show big time rush end
[{'answer': 'July 25 , 2013', 'provenance': [{'wikipedia_id': '28047774', 'title': 'Big Time Rush (band)', 'start_paragraph_id': 1, 'start_character': 415, 'end_paragraph_id': 1, 'end_character': 429, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28047774', 'title': 'Big Time Rush (band)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 614, 'bleu_score': 0.929391499021567, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17700440340239337178}, 'section': 'Section::::Abstract.'}]}]