Table schema:
CREATE TABLE table_name_53 (engine_capacity INTEGER, mpg_us_urban VARCHAR, mpg_uk_urban__cold_ VARCHAR, mpg_uk_extra_urban VARCHAR)

Question: What's the engine capacity when the mpg-UK urban is less than 12.2, the mpg-UK extra urban is less than 18.8 and the mpg-US turban is less than 7.2?
SQL: SELECT SUM(engine_capacity) FROM table_name_53 WHERE mpg_uk_urban__cold_ < 12.2 AND mpg_uk_extra_urban < 18.8 AND mpg_us_urban < 7.2