CREATE TABLE table_11471 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

When the game was played at the Venue of Lake Oval, what was the home team score?
SELECT "Home team score" FROM table_11471 WHERE "Venue" = 'lake oval'
SELECT "Home team score" FROM "table_11471" WHERE "Venue" = 'lake oval'