What are the keywords in the following sentence? smoke rises from a building on fire .
building, fire, smoke

What are the keywords in the following sentence? people across the globe turn to a healthy lifestyle by celebrating holiday
celebrate, globe, holiday

What are the keywords in the following sentence? flower pot by the window with wooden shutters
pot, shutter, window

What are the keywords in the following sentence? astronaut becomes the first human to walk in space
astronaut, human, space