CREATE TABLE table_52291 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the average crowd size for an away team with a score of 14.2 (86)?
SELECT SUM("Crowd") FROM table_52291 WHERE "Away team score" = '14.2 (86)'
SELECT SUM("Crowd") FROM "table_52291" WHERE "Away team score" = '14.2 (86)'