CREATE TABLE table_17218 ("Institution" TEXT, "Location" TEXT, "Founded" FLOAT, "Type" TEXT, "Enrollment" FLOAT, "Nickname" TEXT, "Joined" FLOAT)

The fighting knights has what type of nickname?
SELECT "Type" FROM table_17218 WHERE "Nickname" = 'Fighting Knights'
SELECT "Type" FROM "table_17218" WHERE "Nickname" = 'Fighting Knights'