Question: how many episodes are in season 5 of grey's
[{'answer': 'twenty - four', 'provenance': [{'wikipedia_id': '19501664', 'title': "Grey's Anatomy (season 5)", 'start_paragraph_id': 1, 'start_character': 236, 'end_paragraph_id': 1, 'end_character': 253, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19501664', 'title': "Grey's Anatomy (season 5)", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 792, 'bleu_score': 0.9580586225500781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9924916428766530250}, 'section': 'Section::::Abstract.'}]}]