Table: radio_stations_38
Columns: call_sign
frequency_mhz
city_of_license
erp_w
height_m_ft
class
fcc_info

Question: What is the Frequency MHz of Trinidad, Colorado?
SQL: SELECT "frequency_mhz" FROM radio_stations_38 WHERE "city_of_license" = 'trinidad, colorado'

Question: What city of license has an ERP W smaller than 500, Class A, and Frequency MHz larger than 89.7?
SQL: SELECT "city_of_license" FROM radio_stations_38 WHERE "erp_w" < 500 AND "class" = 'a' AND "frequency_mhz" > 89.7