CREATE TABLE table_38164 ("Season" FLOAT, "Belonging league" TEXT, "Matches" FLOAT, "Points" FLOAT, "Draw" FLOAT, "Lose" FLOAT, "Goal difference" FLOAT, "Goals For" FLOAT, "Goals Against" FLOAT, "Position" FLOAT)

What is the lowest goals against value for a team with 83 points and a difference over 50?
SELECT MIN("Goals Against") FROM table_38164 WHERE "Points" = '83' AND "Goal difference" > '50'
SELECT MIN("Goals Against") FROM "table_38164" WHERE "Goal difference" > '50' AND "Points" = '83'