CREATE TABLE table_55056 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the away team score of the game that was played at princes park?
SELECT "Away team score" FROM table_55056 WHERE "Venue" = 'princes park'
SELECT "Away team score" FROM "table_55056" WHERE "Venue" = 'princes park'