CREATE TABLE table_3351 ("meas. num" FLOAT, "passed" TEXT, "YES votes" FLOAT, "NO votes" FLOAT, "% YES" TEXT, "Const. Amd.?" TEXT, "type" TEXT, "description" TEXT)

Name the least yes votes for yes passed
SELECT MIN("YES votes") FROM table_3351 WHERE "passed" = 'YES'
SELECT MIN("YES votes") FROM "table_3351" WHERE "passed" = 'YES'