CREATE TABLE table_62052 ("Round" FLOAT, "Race" CLOB, "Circuit" CLOB, "Date" CLOB, "Event" CLOB, "Winning driver" CLOB)

What shows for round when the race was Int. Adac Preis Von Zweibr cken?
SELECT "Round" FROM table_62052 WHERE "Race" = 'int. adac preis von zweibrücken'
SELECT "Round" FROM "table_62052" WHERE "Race" = 'int. adac preis von zweibrücken'