SELECT Police_force FROM county_public_safety WHERE LOCATION  =  "East" INTERSECT SELECT Police_force FROM county_public_safety WHERE LOCATION  =  "West"
Show the police force shared by counties with location on the east and west.
SELECT Police_force FROM county_public_safety WHERE LOCATION = `` East '' INTERSECT SELECT Police_force FROM county_public_safety WHERE LOCATION = `` West ''
select police_force from county_public_safety where location = value intersect select police_force from county_public_safety where location = value
Show the police force shared by counties with location on the east and west .