CREATE TABLE table_51231 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What away team has a home team score of 10.13 (73)?
SELECT "Away team" FROM table_51231 WHERE "Home team score" = '10.13 (73)'
SELECT "Away team" FROM "table_51231" WHERE "Home team score" = '10.13 (73)'