Task: Text to Code
Input (English): How many distinct locations have the things with service detail 'Unsatisfied' been located in?
Output (English): 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'