Q: Keywords: boat, park, waterway
What is a sentence that includes all these keywords?

A: A boat is parked near a curb on the waterway.

Q: Keywords: cliff, form, sea
What is a sentence that includes all these keywords?

A: cliffs forming in the sea

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

A:
A train traveling past a row of four smoke stacks.