CREATE TABLE table_51754 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

When the away team scored 7.9 (51), what was the smallest crowd that turned out?
SELECT MIN("Crowd") FROM table_51754 WHERE "Away team score" = '7.9 (51)'
SELECT MIN("Crowd") FROM "table_51754" WHERE "Away team score" = '7.9 (51)'