Question: when does mark sloan die on grey anatomy
[{'answer': 'ninth season', 'provenance': [{'wikipedia_id': '10213087', 'title': "Mark Sloan (Grey's Anatomy)", 'start_paragraph_id': 11, 'start_character': 674, 'end_paragraph_id': 11, 'end_character': 686, 'bleu_score': 1.0, 'section': 'Section::::Development.:Casting and creation.\n'}]}]