Question: who did lexi date on grey's anatomy
[{'answer': 'Mark Sloan', 'provenance': [{'wikipedia_id': '11340577', 'title': 'Lexie Grey', 'start_paragraph_id': 2, 'start_character': 168, 'end_paragraph_id': 2, 'end_character': 178, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11340577', 'title': 'Lexie Grey', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 656, 'bleu_score': 0.632046398283407, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13563850144262083886}, 'section': 'Section::::Abstract.'}]}]