Table: railway_vehicles_6
Columns: builder
construct_tion_no
date_ordered
wheel_arrange_ment
s_cylinder
engine_weight
tc_stl_no_1883_84

Question: How many constructions has a Wheel arrange- ment of 4-4-0?
SQL: SELECT SUM("construct_tion_no") FROM railway_vehicles_6 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 railway_vehicles_6 WHERE "tc_stl_no_1883_84" > 54 AND "date_ordered" = 'november 1881'