user: Question: What is the ISBN in 1999?
Columns: ['Japanese Title', 'English Title', 'Year', 'First publisher', 'ISBN']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['魔天楼 (Matenrō)', 'Demon Skyscraper', 1996.0, 'Kodansha Bunko', 'ISBN 4-06-263346-9']
SQL:

assistant: SELECT "ISBN" FROM "Table" WHERE "Year" = 1999.0;