CREATE TABLE table_7986 ("Frequency" TEXT, "Call sign" TEXT, "Branding" TEXT, "Format" TEXT, "Owner" TEXT)

Which call sign has a frequency of FM 105.3?
SELECT "Call sign" FROM table_7986 WHERE "Frequency" = 'fm 105.3'
SELECT "Call sign" FROM "table_7986" WHERE "Frequency" = 'fm 105.3'