CREATE TABLE table_36688 ("Rank" FLOAT, "Name" TEXT, "Nationality" TEXT, "1st  ( m ) " FLOAT, "2nd  ( m ) " FLOAT, "Points" FLOAT, "Overall FHT points" TEXT, "Overall WC points  ( Rank ) " TEXT)

What is the lowest 2nd (m) when the points were larger than 251.6?
SELECT MIN("2nd (m)") FROM table_36688 WHERE "Points" > '251.6'
SELECT MIN("2nd (m)") FROM "table_36688" WHERE "Points" > '251.6'