Question: when does elijah first appear on vampire diaries
[{'answer': 'Rose', 'provenance': [{'wikipedia_id': '28462351', 'title': 'The Vampire Diaries (season 2)', 'start_paragraph_id': 50, 'start_character': 436, 'end_paragraph_id': 50, 'end_character': 440, 'bleu_score': 1.0, 'section': 'Section::::Production.:Cast.\n'}]}]