Question: the legend of the blue sea hero name
[{'answer': 'Heo Joon - jae', 'provenance': [{'wikipedia_id': '50680199', 'title': 'Legend of the Blue Sea', 'start_paragraph_id': 10, 'start_character': 21, 'end_paragraph_id': 10, 'end_character': 38, 'bleu_score': 1.0, 'section': 'Section::::Plot Summary.:Joon-jae and Shim Cheong.\n'}]}, {'provenance': [{'wikipedia_id': '50680199', 'title': 'Legend of the Blue Sea', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 390, 'bleu_score': 0.923732788176137, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3484782316419844176}, 'section': 'Section::::Plot Summary.\n'}]}]