CREATE TABLE table_203_519 (id DECIMAL, "pos" DECIMAL, "no" DECIMAL, "driver" TEXT, "team" TEXT, "laps" DECIMAL, "time/retired" TEXT, "grid" DECIMAL, "points" DECIMAL)

which canadian driver finished first : alex tagliani or paul tracy ?
SELECT "driver" FROM table_203_519 WHERE "driver" IN ('alex tagliani', 'paul tracy') ORDER BY "pos" LIMIT 1
SELECT "driver" FROM "table_203_519" WHERE "driver" IN ('alex tagliani', 'paul tracy') ORDER BY "pos" NULLS FIRST LIMIT 1