CREATE TABLE table_23500 ("Round" FLOAT, "Location" TEXT, "Country" TEXT, "Date" TEXT, "Fastest Qualifying" TEXT, "Winning Pilot" TEXT, "Winning Aircraft" TEXT)

Name the country for hannes arch
SELECT "Country" FROM table_23500 WHERE "Winning Pilot" = 'Hannes Arch'
SELECT "Country" FROM "table_23500" WHERE "Winning Pilot" = 'Hannes Arch'