CREATE TABLE table_50410 ("Branding" CLOB, "Callsign" CLOB, "Frequency" CLOB, "Power  ( kW ) " CLOB, "Location" CLOB)

Which frequency is located in Dagupan?
SELECT "Frequency" FROM table_50410 WHERE "Location" = 'dagupan'
SELECT "Frequency" FROM "table_50410" WHERE "Location" = 'dagupan'