What are the keywords in the following sentence? portrait of a cheetah lying down
cheetah, lie, portrait

What are the keywords in the following sentence? a town an ancient city in the southwest of country hewn from towering walls of rock
city, country, rock, tower, wall

What are the keywords in the following sentence? nitrogen sensitive lichens grow on a tree
grow, lichen, tree

What are the keywords in the following sentence? wedding champagne glasses with a bow on a stone railing .
bow, glass, wedding