CREATE TABLE table_50897 ("Round" TEXT, "St Kilda Saints" TEXT, "Opposition" TEXT, "Their Score" TEXT, "Margin" FLOAT)

What is the most reduced Margin that has a St Kilda Saints of 11.13 (79)?
SELECT MIN("Margin") FROM table_50897 WHERE "St Kilda Saints" = '11.13 (79)'
SELECT MIN("Margin") FROM "table_50897" WHERE "St Kilda Saints" = '11.13 (79)'