What are the keywords in the following sentence? couple receiving a visit of the nurse in the hospital
couple, hospital, nurse, receive, visit

What are the keywords in the following sentence? woodpecker eats walnuts on a tree
eat, tree, walnut

What are the keywords in the following sentence? college students reading their notes together during the break
note, read, student

What are the keywords in the following sentence? wagon being pulled by mule in village during a road trip km east
mule, pull, wagon