What are the keywords in the following sentence? Train engine on a train track and releasing steam.
engine, steam, track

What are the keywords in the following sentence? people sunbathe and picnic under a large willow tree on a hot summers day
day, sunbathe, tree

What are the keywords in the following sentence? the home has bedrooms and bathrooms despite the couple not having had any children
bathroom, couple, home

What are the keywords in the following sentence? test drive the automobile model
drive, model, test