Question: Which city has frequency under 106.5MHz and a callsign of W218CK?
SQL: SELECT "City of license" FROM "2-12839896-1" WHERE "Frequency MHz" < 106.5 AND "Call sign" = 'W218CK';

Question: Which class has a city of Richmond, Virginia?
SQL: SELECT "Class" FROM "2-12839896-1" WHERE "City of license" = 'Richmond, Virginia';

Question: What is the ERP W for the frequency of 91.3MHz?
SQL: SELECT "ERP W" FROM "2-12839896-1" 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 "2-12839896-1" WHERE "Frequency MHz" > 98.5 AND "ERP W" < 155.0;