CREATE TABLE table_51918 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

Which away team has a Home team score of 17.13 (115)?
SELECT "Away team" FROM table_51918 WHERE "Home team score" = '17.13 (115)'
SELECT "Away team" FROM "table_51918" WHERE "Home team score" = '17.13 (115)'