What are the keywords in the following sentence? a train heads into a city just after crossing tourist attraction
attraction, city, cross

What are the keywords in the following sentence? a cat sleeping on top of a laptop
cat, laptop, sleep

What are the keywords in the following sentence? a cheetah and her cubs eats gazelle in a rain shower .
cheetah, cub, gazelle

What are the keywords in the following sentence? the universe with planet and stars
planet, star, universe