CREATE TABLE table_42413 ("City of license" TEXT, "Identifier" TEXT, "Frequency" TEXT, "Power" TEXT, "Class" TEXT, "RECNet" TEXT)

What is Identifier, when City of License is Hornepayne?
SELECT "Identifier" FROM table_42413 WHERE "City of license" = 'hornepayne'
SELECT "Identifier" FROM "table_42413" WHERE "City of license" = 'hornepayne'