SELECT T2.Crime_rate FROM city AS T1 JOIN county_public_safety AS T2 ON T1.County_ID  =  T2.County_ID WHERE T1.White  >  90
Show the crime rate of counties with a city having white percentage more than 90.
[Schema (values) (types)]: | county_public_safety |  county_public_safety : county_id (text) , name (number) , population (text) , police_officers (number) , residents_per_officer (number) , case_burden (number) , crime_rate (number) , police_force (number) , location (text) | city : city_id (text) , county_id (number) , name (text) , white (number) , black (number) , amerindian (number) , asian (number) , multiracial (number) , hispanic (text);