What are the keywords in the following sentence? an astronaut drifting in space is rescued by a space shuttle orbiting earth
astronaut, drift, earth, rescue, shuttle

What are the keywords in the following sentence? location and geological map with the studied sections
location, map, section

What are the keywords in the following sentence? tow truck about to tow away a broken down bus
break, bus, tow, truck

What are the keywords in the following sentence? People comfort each other as the white ship glides away from the dock.
dock, glide, ship