CREATE TABLE table_50345 ("Callsign" CLOB, "Area served" CLOB, "Band" CLOB, "Freq currently" CLOB, "Purpose" CLOB)

What is the Purpose of the Callsign with a Freq currently of 4gld?
SELECT "Purpose" FROM table_50345 WHERE "Freq currently" = '4gld'
SELECT "Purpose" FROM "table_50345" WHERE "Freq currently" = '4gld'