Table: radio_stations_3
Columns: call_sign
frequency
city_of_license
facility_id
erp_power_w
height_m_ft
class
fcc_info

Question: What is the lowest facility ID that's in Beckley?
SQL: SELECT MIN("facility_id") FROM radio_stations_3 WHERE "city_of_license" = 'beckley'

Question: What city has the A Class licence?
SQL: SELECT "city_of_license" FROM radio_stations_3 WHERE "class" = 'a'