What are the keywords in the following sentence? An elephant lifts its tusk to reach a tree.
elephant, reach, tree

What are the keywords in the following sentence? the city of biggest christmas tree yet is lowered into place on monday morning .
city, place, tree

What are the keywords in the following sentence? nurse and doctors in a hospital
doctor, hospital, nurse

What are the keywords in the following sentence? A giraffe that is eating some grass on the ground.
eat, giraffe, ground