Q: Keywords: lichen, tree, trunk
What is a sentence that includes all these keywords?

A: lichen on the trunk of a tree

Q: Keywords: city, surround, wall
What is a sentence that includes all these keywords?

A: a medieval wall surrounds the port city .

Q: Keywords: earth, orbit, station
What is a sentence that includes all these keywords?

A:
a depiction of the space shuttle docked at the international space station orbiting earth .