Question: what are the 3 dragons called in game of thrones
[{'answer': 'Drogon', 'provenance': [{'wikipedia_id': '41374286', 'title': 'Daenerys Targaryen', 'start_paragraph_id': 18, 'start_character': 489, 'end_paragraph_id': 18, 'end_character': 495, 'bleu_score': 1.0, 'section': 'Section::::Storylines.:"A Clash of Kings".\n'}]}, {'answer': 'Rhaegal', 'provenance': [{'wikipedia_id': '41374286', 'title': 'Daenerys Targaryen', 'start_paragraph_id': 22, 'start_character': 343, 'end_paragraph_id': 22, 'end_character': 350, 'bleu_score': 1.0, 'section': 'Section::::Storylines.:"A Dance with Dragons".\n'}]}, {'answer': 'Viserion', 'provenance': [{'wikipedia_id': '41374286', 'title': 'Daenerys Targaryen', 'start_paragraph_id': 22, 'start_character': 355, 'end_paragraph_id': 22, 'end_character': 363, 'bleu_score': 1.0, 'section': 'Section::::Storylines.:"A Dance with Dragons".\n'}]}, {'provenance': [{'wikipedia_id': '41374286', 'title': 'Daenerys Targaryen', 'start_paragraph_id': 30, 'start_character': 0, 'end_paragraph_id': 30, 'end_character': 845, 'bleu_score': 0.9866213202385071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14345513682281239777}, 'section': 'Section::::TV adaptation.:Storylines.:Season 1.\n'}]}]