What are the keywords in the following sentence? crossing the streams on trail
cross, stream, trail

What are the keywords in the following sentence? visitors observe a vehicle at the booth featured
booth, observe, vehicle, visitor

What are the keywords in the following sentence? A monitor, keyboard, mouse, laptop and speakers on a desk.
keyboard, laptop, monitor, mouse, speaker

What are the keywords in the following sentence? mother carefully puts sleeping baby in the crib
crib, mother, sleep