Question: who died in harry potter half blood prince
[{'answer': 'Dumbledore', 'provenance': [{'wikipedia_id': '858575', 'title': 'Harry Potter and the Half-Blood Prince (film)', 'start_paragraph_id': 7, 'start_character': 50, 'end_paragraph_id': 7, 'end_character': 60, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}]