CREATE TABLE table_55624 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What's the average crowd size when the venue is western oval?
SELECT AVG("Crowd") FROM table_55624 WHERE "Venue" = 'western oval'
SELECT AVG("Crowd") FROM "table_55624" WHERE "Venue" = 'western oval'