Table: hopkins_uv_telescope
Columns: name
aperture_m
aper_in
mirror_type
nationality_sponsors
site
built_used

Question: Which aperture were built or used between 1987-2001?
SQL: SELECT "aper_in" FROM hopkins_uv_telescope WHERE "built_used" = '1987-2001'

Question: How many nationalities/sponsors for mirror/type schmidt uv?
SQL: SELECT COUNT("nationality_sponsors") FROM hopkins_uv_telescope WHERE "mirror_type" = 'Schmidt UV'

Question: Which telescopes were sponsored by or originated in Belgium?
SQL: SELECT "name" FROM hopkins_uv_telescope WHERE "nationality_sponsors" = 'Belgium'