Question: when was harry potter and the chamber of secrets published
[{'answer': '2 June 1999', 'provenance': [{'wikipedia_id': '163234', 'title': 'Harry Potter and the Chamber of Secrets', 'start_paragraph_id': 2, 'start_character': 109, 'end_paragraph_id': 2, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '163234', 'title': 'Harry Potter and the Chamber of Secrets', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 698, 'bleu_score': 0.983401048538667, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13698292601459335724}, 'section': 'Section::::Abstract.'}]}]