CREATE TABLE table_1140073_2 (race VARCHAR2, pole_position VARCHAR2, location VARCHAR2)

What race had Nelson Piquet on the pole and was in N rburgring?
SELECT race FROM table_1140073_2 WHERE pole_position = "Nelson Piquet" AND location = "Nürburgring"
SELECT "race" FROM "table_1140073_2" WHERE "Nelson Piquet" = "pole_position" AND "Nürburgring" = "location"