Table: radio_stations_33
Columns: call_sign
frequency_mhz
city_of_license
erp_w
class
fcc_info

Question: Which city has frequency under 106.5MHz and a callsign of w218ck?
SQL: SELECT "city_of_license" FROM radio_stations_33 WHERE "frequency_mhz" < 106.5 AND "call_sign" = 'w218ck'

Question: Which class has a city of Richmond, Virginia?
SQL: SELECT "class" FROM radio_stations_33 WHERE "city_of_license" = 'richmond, virginia'

Question: What is the ERP W for the frequency of 91.3MHz?
SQL: SELECT "erp_w" FROM radio_stations_33 WHERE "frequency_mhz" = 91.3

Question: Which call sign has a frequency greater than 98.5MHz and ERP W under 155?
SQL: SELECT "call_sign" FROM radio_stations_33 WHERE "frequency_mhz" > 98.5 AND "erp_w" < 155