CREATE TABLE "driver" (
"Driver_ID" int,
"Name" text,
"Party" text,
"Home_city" text,
"Age" int,
PRIMARY KEY ("Driver_ID")
)

CREATE TABLE "school" (
"School_ID" int,
"Grade" text,
"School" text,
"Location" text,
"Type" text,
PRIMARY KEY ("School_ID")
)

CREATE TABLE "school_bus" (
"School_ID" int,
"Driver_ID" int,
"Years_Working" int,
"If_full_time" bool,
PRIMARY KEY ("School_ID","Driver_ID"),
FOREIGN KEY ("School_ID") REFERENCES `school`("School_ID"),
FOREIGN KEY ("Driver_ID") REFERENCES `driver`("Driver_ID")
)
SELECT home_city FROM driver EXCEPT SELECT home_city FROM driver WHERE age  >  40
Show all home cities except for those having a driver older than 40.