CREATE TABLE table_11735 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the date that the away team scored 4.7 (31)?
SELECT "Date" FROM table_11735 WHERE "Away team score" = '4.7 (31)'
SELECT "Date" FROM "table_11735" WHERE "Away team score" = '4.7 (31)'