CREATE TABLE table_1182 ("Constituency" TEXT, "Electorate" FLOAT, "s Spoilt vote" FLOAT, "Total poll  ( % ) " TEXT, "For  ( % ) " TEXT, "Against  ( % ) " TEXT)

in electorate of 83850 what is the minimum s split vote
SELECT MIN("s Spoilt vote") FROM table_1182 WHERE "Electorate" = '83850'
SELECT MIN("s Spoilt vote") FROM "table_1182" WHERE "Electorate" = '83850'