query: SELECT Police_force FROM county_public_safety WHERE LOCATION  =  "East" INTERSECT SELECT Police_force FROM county_public_safety WHERE LOCATION  =  "West"
question: Which police forces operate in both counties that are located in the East and in the West?
query_toks: SELECT Police_force FROM county_public_safety WHERE LOCATION = `` East '' INTERSECT SELECT Police_force FROM county_public_safety WHERE LOCATION = `` West ''
query_toks_no_value: select police_force from county_public_safety where location = value intersect select police_force from county_public_safety where location = value
question_toks: Which police forces operate in both counties that are located in the East and in the West?