CREATE TABLE table_66086 ("Frequency" TEXT, "Call sign" TEXT, "Branding" TEXT, "Format" TEXT, "Owner" TEXT)

What is the call sign for country station fm 93.1?
SELECT "Call sign" FROM table_66086 WHERE "Format" = 'country' AND "Frequency" = 'fm 93.1'
SELECT "Call sign" FROM "table_66086" WHERE "Format" = 'country' AND "Frequency" = 'fm 93.1'