Question: when does lexi die in grey's anatomy
[{'answer': 'the eighth - season finale', 'provenance': [{'wikipedia_id': '11340577', 'title': 'Lexie Grey', 'start_paragraph_id': 27, 'start_character': 202, 'end_paragraph_id': 27, 'end_character': 227, 'bleu_score': 1.0, 'section': 'Section::::Development.:Casting and creation.\n'}]}]