CREATE TABLE table_4637 ("Round" FLOAT, "Name" TEXT, "Circuit" TEXT, "Date" TEXT, "Winning driver" TEXT, "Winning car" TEXT)

Which driver drove car Wolf WR3?
SELECT "Winning driver" FROM table_4637 WHERE "Winning car" = 'wolf wr3'
SELECT "Winning driver" FROM "table_4637" WHERE "Winning car" = 'wolf wr3'