CREATE TABLE table_51356 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

How much did the away team St Kilda score?
SELECT "Away team score" FROM table_51356 WHERE "Away team" = 'st kilda'
SELECT "Away team score" FROM "table_51356" WHERE "Away team" = 'st kilda'