Which aperture were built or used between 1987-2001?
CREATE TABLE table_23851574_2 (aper_in VARCHAR, built_used VARCHAR)
SELECT aper_in FROM table_23851574_2 WHERE built_used = "1987-2001"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_23851574_2 (aper_in VARCHAR, built_used VARCHAR) Question: Which aperture were built or used between 1987-2001? [/INST] SELECT aper_in FROM table_23851574_2 WHERE built_used = "1987-2001" </s>