CREATE TABLE table_204_501 (id DECIMAL, "institution" TEXT, "location" TEXT, "nickname" TEXT, "founded" DECIMAL, "type" TEXT, "enrollment" DECIMAL, "joined" DECIMAL)

which two institutions joined the same year as clarke university ?
SELECT "institution" FROM table_204_501 WHERE "institution" <> 'clarke university' AND "joined" = (SELECT "joined" FROM table_204_501 WHERE "institution" = 'clarke university')
SELECT "institution" FROM "table_204_501" WHERE "institution" <> 'clarke university' AND "joined" = (SELECT "joined" FROM "table_204_501" WHERE "institution" = 'clarke university')