-- Database schema
| film : Film_ID [ INT ] primary_key , Rank_in_series [ INT ] , Number_in_season [ INT ] , Title [ TEXT ] , Directed_by [ TEXT ] , Original_air_date [ TEXT ] , Production_code [ TEXT ] | cinema : Cinema_ID [ INT ] primary_key , Name [ TEXT ] , Openning_year [ INT ] , Capacity [ INT ] , Location [ TEXT ] | schedule : Cinema_ID [ INT ] primary_key schedule.Cinema_ID = cinema.Cinema_ID , Film_ID [ INT ] schedule.Film_ID = film.Film_ID , Date [ TEXT ] , Show_times_per_day [ INT ] , Price [ INT ] |
-- -- Show all the locations where no cinema has capacity over 800.

SELECT LOCATION FROM cinema EXCEPT SELECT LOCATION FROM cinema WHERE capacity  >  800;