Concepts: carry, container, train
A: A train carrying freight containers is on the tracks.
Concepts: begin, fire, weapon
A: They begin to go down again and the sergeant fires some weapons down the aisle.
Concepts: bathroom, counter, sink, window
A: A bathroom with a sink, counter, cabinets and a window.
Concepts: build, structure, tower
A:
the traditional tower has existed but the current structure was built