Question: how many seasons if greys anatomy are there
[{'answer': '14', 'provenance': [{'wikipedia_id': '1660277', 'title': "Grey's Anatomy", 'start_paragraph_id': 35, 'start_character': 490, 'end_paragraph_id': 35, 'end_character': 492, 'bleu_score': 1.0, 'section': 'Section::::Production and development.:Casting.\n'}]}]