CREATE TABLE table_55518 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

In Western Oval, what was the away team score?
SELECT "Away team score" FROM table_55518 WHERE "Venue" = 'western oval'
SELECT "Away team score" FROM "table_55518" WHERE "Venue" = 'western oval'