Question: harry potter and the half blood prince who is the half blood prince
[{'answer': 'Snape', 'provenance': [{'wikipedia_id': '2270723', 'title': 'Harry Potter and the Half-Blood Prince', 'start_paragraph_id': 7, 'start_character': 8, 'end_paragraph_id': 7, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '2270723', 'title': 'Harry Potter and the Half-Blood Prince', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 1493, 'bleu_score': 0.9923223148404691, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16170794649498352635}, 'section': 'Section::::Plot.\n'}]}]