CREATE TABLE table_23018 ("Call sign" TEXT, "Frequency" TEXT, "City of License" TEXT, "Licensee" TEXT, "Format" TEXT)

When 90.7 fm is the frequency who is the licensee?
SELECT "Licensee" FROM table_23018 WHERE "Frequency" = '90.7 FM'
SELECT "Licensee" FROM "table_23018" WHERE "Frequency" = '90.7 FM'