Question: when does harry potter find out he's a wizard
[{'answer': 'on his eleventh birthday', 'provenance': [{'wikipedia_id': '727836', 'title': 'Harry Potter (character)', 'start_paragraph_id': 1, 'start_character': 178, 'end_paragraph_id': 1, 'end_character': 202, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '727836', 'title': 'Harry Potter (character)', 'start_paragraph_id': 1, 'start_character': 46, 'end_paragraph_id': 1, 'end_character': 682, 'bleu_score': 0.8427778114254131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10203140075636033995}, 'section': 'Section::::Abstract.'}]}]