Question: who does stefan end up with vampire diaries
[{'answer': 'Caroline Forbes', 'provenance': [{'wikipedia_id': '24393478', 'title': 'Stefan Salvatore', 'start_paragraph_id': 18, 'start_character': 776, 'end_paragraph_id': 18, 'end_character': 791, 'bleu_score': 1.0, 'section': 'Section::::Television series.:Storyline.:Season 1-3.\n'}]}]