Question: when was harry potter and the philosophers stone published
[{'answer': '1997', 'provenance': [{'wikipedia_id': '48648', 'title': "Harry Potter and the Philosopher's Stone", 'start_paragraph_id': 2, 'start_character': 62, 'end_paragraph_id': 2, 'end_character': 66, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'in 1997', 'provenance': [{'wikipedia_id': '48648', 'title': "Harry Potter and the Philosopher's Stone", 'start_paragraph_id': 41, 'start_character': 0, 'end_paragraph_id': 41, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Development, publication and reception.:Publication and reception in the United Kingdom.\n'}]}, {'provenance': [{'wikipedia_id': '48648', 'title': "Harry Potter and the Philosopher's Stone", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 628, 'bleu_score': 0.641890959261602, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16022179962333216289}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '254498', 'title': 'Harry Potter and the Prisoner of Azkaban', 'section': 'Section::::Publication and reception.:Pre-release history.\n', 'start_paragraph_id': 19, 'end_paragraph_id': 19, 'meta': {'evidence_span': ['"Harry Potter and the Prisoner of Azkaban" is the third book in the "Harry Potter" series. The first, "Harry Potter and the Philosopher\'s Stone" ("Harry Potter and the Sorcerer\'s Stone" in the US), was published by Bloomsbury on 26 June 1997 and the second, "Harry Potter and the Chamber of Secrets", was published on 2 July 1998. Rowling started to write the "Prisoner of Azkaban" the day after she finished "The Chamber of Secrets". Rowling\'s favourite aspect of this book was introducing the', 'The first, "Harry Potter and the Philosopher\'s Stone" ("Harry Potter and the Sorcerer\'s Stone" in the US), was published by Bloomsbury on 26 June 1997 and the second, "Harry Potter and the Chamber of Secrets", was published on 2 July 1998']}}]}, {'provenance': [{'wikipedia_id': '776049', 'title': 'Harry Potter and the Deathly Hallows', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Harry Potter and the Deathly Hallows is a fantasy novel written by British author J. K. Rowling and the seventh and final novel of the "Harry Potter" series. The book was released on 21 July 2007, ending the series that began in 1997 with the publication of "Harry Potter and the Philosopher\'s Stone". It was published in the United Kingdom by Bloomsbury Publishing, in the United States by Scholastic, and in Canada by Raincoast Books. The novel chronicles the events directly following "Harry Potter and the Half-Blood Prince" (2005) and the final confrontation between the wizards Harry Potter and Lord Voldemort.', 'The book was released on 21 July 2007, ending the series that began in 1997 with the publication of "Harry Potter and the Philosopher\'s Stone".']}}]}, {'provenance': [{'wikipedia_id': '667361', 'title': "Harry Potter and the Philosopher's Stone (film)", 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['1997', 'Harry Potter and the Philosopher\'s Stone (released in the United States, India and Pakistan as Harry Potter and the Sorcerer\'s Stone) is a 2001 fantasy film directed by Chris Columbus and distributed by Warner Bros. Pictures. It is based on J. K. Rowling\'s 1997 novel of the same name. The film is the first instalment of the "Harry Potter" film series and was written by Steve Kloves and produced by David Heyman. Its story follows Harry Potter\'s first year at Hogwarts School of Witchcraft and Wizardry as he discovers that he is a famous wizard and begins his education. The film stars Daniel Radcliffe as Harry Potter, with Rupert Grint as Ron Weasley, and Emma Watson as Hermione Granger.', "It is based on J. K. Rowling's 1997 novel of the same name."]}}]}, {'provenance': [{'wikipedia_id': '48648', 'title': "Harry Potter and the Philosopher's Stone", 'section': 'Section::::Development, publication and reception.:Publication and reception in the United Kingdom.\n', 'start_paragraph_id': 41, 'end_paragraph_id': 41, 'meta': {'evidence_span': ['1997', '1997 the UK edition won a National Book Award and a gold medal in the 9- to 11-year-olds category of the Nestlé Smarties Book Prize. The "Smarties" award, which is voted for by children, made the book well known within six months of publication, while most children\'s books have to wait for years. The following year,', 'In 1997 the UK edition won a National Book Award and a gold medal in the 9- to 11-year-olds category of the Nestlé Smarties Book Prize.']}}]}]