CREATE TABLE table_77836 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

Which Crowd has an Away team score of 8.6 (54)?
SELECT AVG("Crowd") FROM table_77836 WHERE "Away team score" = '8.6 (54)'
SELECT AVG("Crowd") FROM "table_77836" WHERE "Away team score" = '8.6 (54)'