CREATE TABLE table_51745 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What venue did the away team Collingwood play at?
SELECT "Venue" FROM table_51745 WHERE "Away team" = 'collingwood'
SELECT "Venue" FROM "table_51745" WHERE "Away team" = 'collingwood'