CREATE TABLE table_10571 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What was the top crowd when essendon played away?
SELECT MAX("Crowd") FROM table_10571 WHERE "Away team" = 'essendon'
SELECT MAX("Crowd") FROM "table_10571" WHERE "Away team" = 'essendon'