Question: when did the first episode of greys anatomy air
[{'answer': 'March 27 , 2005', 'provenance': [{'wikipedia_id': '1660277', 'title': "Grey's Anatomy", 'start_paragraph_id': 91, 'start_character': 96, 'end_paragraph_id': 91, 'end_character': 114, 'bleu_score': 1.0, 'section': 'Section::::Broadcast history.\n'}]}, {'provenance': [{'wikipedia_id': '1660277', 'title': "Grey's Anatomy", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 864, 'bleu_score': 0.7480380370662031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14947512807501330895}, 'section': 'Section::::Abstract.'}]}]