Q: Keywords: pen, tree, zebra
What is a sentence that includes all these keywords?

A: Two zebras attacking each other in a pen next to trees.

Q: Keywords: boat, image, sea
What is a sentence that includes all these keywords?

A: image of a boat at sea

Q: Keywords: airplane, airport, park, plane
What is a sentence that includes all these keywords?

A:
A FedEx airplane parked in an airport with other planes behind it.