CREATE TABLE table_name_8 (mpg_uk_urban__cold_ VARCHAR(255), l_100km_urban__cold_ VARCHAR(255), engine_capacity VARCHAR(255), fuel_type VARCHAR(255), mpg_uk_extra_urban VARCHAR(255))
What is the mpg-UK urban (cold) for a fuel type of diesel, extraurban MPG in the UK over 68.9, engine capacity of 1422, and L/100km urban (cold) over 5.1?
    
SQL: SELECT mpg_uk_urban__cold_ FROM table_name_8 WHERE fuel_type = "diesel" AND mpg_uk_extra_urban > 68.9 AND engine_capacity = 1422 AND l_100km_urban__cold_ > 5.1