CREATE TABLE table_33761 ("Team" TEXT, "Chassis" TEXT, "Engine" TEXT, "Driver ( s ) " TEXT, "Sponsor ( s ) " TEXT, "Rounds" TEXT)

Which rounds did the team Walther participate in?
SELECT "Rounds" FROM table_33761 WHERE "Team" = 'walther'
SELECT "Rounds" FROM "table_33761" WHERE "Team" = 'walther'