Concepts: airport, bag, wait
A: People waiting for their bags in an airport.
Concepts: pack, room, thing
A: two people are packing some things into some boxes in a large living room
Concepts: bridge, pedestrian, traffic
A: traffic and pedestrians stop at a light as the bridge is lifted
Concepts: coaster, sky, track
A:
a roller coaster going up the tracks against a blue sky