CREATE TABLE table_50342 ("Callsign" CLOB, "Area served" CLOB, "Band" CLOB, "Freq currently" CLOB, "Purpose" CLOB)

What is the Callsign in Brisbane with a Freq currently of 4rph?
SELECT "Callsign" FROM table_50342 WHERE "Area served" = 'brisbane' AND "Freq currently" = '4rph'
SELECT "Callsign" FROM "table_50342" WHERE "Area served" = 'brisbane' AND "Freq currently" = '4rph'