CREATE TABLE table_20740 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Crowd" FLOAT, "Date" TEXT)

What was the maximum crowd size against St Kilda?
SELECT MAX("Crowd") FROM table_20740 WHERE "Away team" = 'St Kilda'
SELECT MAX("Crowd") FROM "table_20740" WHERE "Away team" = 'St Kilda'