CREATE TABLE table_13478 ("School" TEXT, "Location" TEXT, "Mascot" TEXT, "Size" FLOAT, "IHSAA Class" TEXT, "County" TEXT)

What is the ISHAA class for the International School?
SELECT "IHSAA Class" FROM table_13478 WHERE "School" = 'international'
SELECT "IHSAA Class" FROM "table_13478" WHERE "School" = 'international'