Q: Keywords: smoke, train, travel
What is a sentence that includes all these keywords?

A: An antique train spewing black smoke as it travels.

Q: Keywords: flock, herd, sheep, sheepdog, shepherd
What is a sentence that includes all these keywords?

A: a shepherd herding a flock of sheep with his sheepdog

Q: Keywords: move, track, train, yard
What is a sentence that includes all these keywords?

A:
Railroad yard with trains and engines moving on tracks.