SELECT "Away team score" FROM table_52491 WHERE "Venue" = 'vfl park'
What was the score of the away team when the game was played at vfl park?
CREATE TABLE table_52491 (
    "Home team" text,
    "Home team score" text,
    "Away team" text,
    "Away team score" text,
    "Venue" text,
    "Crowd" real,
    "Date" text
)