CREATE TABLE table_47721 ("Home team" CLOB, "Home team score" CLOB, "Away team" CLOB, "Away team score" CLOB, "Ground" CLOB, "Crowd" FLOAT, "Date" CLOB)

Which Crowd has a Away team of sydney?
SELECT MAX("Crowd") FROM table_47721 WHERE "Away team" = 'sydney'
SELECT MAX("Crowd") FROM "table_47721" WHERE "Away team" = 'sydney'