CREATE TABLE table_51016 ("Constituency" CLOB, "Electorate" FLOAT, "Votes" FLOAT, "Turnout" FLOAT, "Spoilt" FLOAT, "Percent Yes" FLOAT)

WHAT IS THE LOWEST ELECTORATE WITH 31,511 VOTES, AND PERCENT YES SMALLER THAN 57.2?
SELECT MIN("Electorate") FROM table_51016 WHERE "Votes" = '31,511' AND "Percent Yes" < '57.2'
SELECT MIN("Electorate") FROM "table_51016" WHERE "Percent Yes" < '57.2' AND "Votes" = '31,511'