Concepts: come, engine, smoke
A: An old steam engine has black smoke coming from it.
Q: Keywords: cover, leafs, road
What is a sentence that includes all these keywords?

A: forest road covered in leafs while some trees still have green ones
Produce a sentence which mentions all of these concepts: clean, duck, feather, float, water

duck floats on the water and clean the feathers
[Q]: Generate a sentence that includes all the following words: airplane, stand, tarmac
[A]: A man standing on the tarmac next to an airplane.
CONCEPTS: end, light, tunnel

GEN: empty tunnel that shows a light at the end
[Q]: Generate a sentence that includes all the following words: altar, ceiling, vault
[A]:
high altar and vaulted ceiling