What are the keywords in the following sentence? An airplane in takeoff is gaining height yet seems to be motionless in the sky.
airplane, sky, takeoff

What are the keywords in the following sentence? Several people at an airport wheeling luggage and turning and smiling towards the camera
luggage, smile, turn

What are the keywords in the following sentence? men cutting up tuna in the fish market
cut, market, tuna

What are the keywords in the following sentence? fresh moss growing on the wall
grow, moss, wall