What are the keywords in the following sentence? the fire broke out in the first floor of the apartment building and quickly spread throughout the building .
building, floor, spread

What are the keywords in the following sentence? astronaut making one of the first spacewalks by country during the mission .
astronaut, country, spacewalk

What are the keywords in the following sentence? summer on a lake in the summer garden
garden, lake, summer

What are the keywords in the following sentence? heavy thick smoke covering the sky as it billows up from a fire .
billow, fire, sky, smoke