CREATE TABLE table_5779 ("Call sign" CLOB, "Frequency" CLOB, "City of License" CLOB, "Owner" CLOB, "Format" CLOB)

What is the call sign for the frequency of 0 105.7 fm?
SELECT "Call sign" FROM table_5779 WHERE "Frequency" = '0 105.7 fm'
SELECT "Call sign" FROM "table_5779" WHERE "Frequency" = '0 105.7 fm'