CREATE TABLE table_33672 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

WHAT WAS ESSENDON'S HIGHEST CROWD NUMBER WHEN PLAYING AS THE AWAY TEAM?
SELECT MAX("Crowd") FROM table_33672 WHERE "Away team" = 'essendon'
SELECT MAX("Crowd") FROM "table_33672" WHERE "Away team" = 'essendon'