CREATE TABLE Timed_Locations_of_Things (Location_Code VARCHAR(255), thing_id VARCHAR(255)); CREATE TABLE Things (thing_id VARCHAR(255), service_details VARCHAR(255))
How many distinct locations have the things with service detail 'Unsatisfied' been located in?
    
SQL: SELECT COUNT(DISTINCT T2.Location_Code) FROM Things AS T1 JOIN Timed_Locations_of_Things AS T2 ON T1.thing_id = T2.thing_id WHERE T1.service_details = 'Unsatisfied'