CREATE TABLE table_66474 ("City of license" TEXT, "Identifier" TEXT, "Frequency" TEXT, "Power" TEXT, "Class" TEXT, "RECNet" TEXT)

What power has A as the class, and 93.7 as the frequency?
SELECT "Power" FROM table_66474 WHERE "Class" = 'a' AND "Frequency" = '93.7'
SELECT "Power" FROM "table_66474" WHERE "Class" = 'a' AND "Frequency" = '93.7'