CREATE TABLE table_52604 ("Race" CLOB, "Circuit" CLOB, "Date" CLOB, "Pole position" CLOB, "Fastest lap" CLOB, "Winning driver" CLOB, "Constructor" CLOB, "Tyre" CLOB, "Report" CLOB)

Who has the pole position for the n rburgring circuit?
SELECT "Pole position" FROM table_52604 WHERE "Circuit" = 'nürburgring'
SELECT "Pole position" FROM "table_52604" WHERE "Circuit" = 'nürburgring'