Question: How many constructions has a Wheel arrange- ment of 4-4-0?
SQL: SELECT SUM("Construct- tion no.") FROM "2-1234504-1" WHERE "Wheel arrange- ment" = '4-4-0';

Question: Who built the order on November 1881 of more than 54 TC&StL no. (1883–84)?
SQL: SELECT "Builder" FROM "2-1234504-1" WHERE "TC&StL no. (1883–84)" > 54.0 AND "Date ordered" = 'November 1881';