Question: when did strictly come dancing start on tv
[{'answer': '15 May 2004', 'provenance': [{'wikipedia_id': '975325', 'title': 'Strictly Come Dancing', 'start_paragraph_id': 2, 'start_character': 34, 'end_paragraph_id': 2, 'end_character': 45, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '975325', 'title': 'Strictly Come Dancing', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 467, 'bleu_score': 0.6154662582226861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13595510808097780937}, 'section': 'Section::::Abstract.'}]}]