CREATE TABLE table_8958 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Crowd" FLOAT, "Date" TEXT)

When the Ground was Optus Oval, what is the Home team score?
SELECT "Home team score" FROM table_8958 WHERE "Ground" = 'optus oval'
SELECT "Home team score" FROM "table_8958" WHERE "Ground" = 'optus oval'