CREATE TABLE table_204_476 (id DECIMAL, "name" TEXT, "date built" DECIMAL, "builder" TEXT, "works no." DECIMAL, "wheels" TEXT, "cylinders" TEXT, "notes" TEXT, "withdrawn" DECIMAL)

was no. 1 or veteran built in 1847 ?
SELECT "name" FROM table_204_476 WHERE "name" IN ('no.1', 'veteran') AND "date built" = 1847
SELECT "name" FROM "table_204_476" WHERE "date built" = 1847 AND "name" IN ('no.1', 'veteran')