What are the keywords in the following sentence? passengers entering an airplane on an airport
airport, enter, passenger

What are the keywords in the following sentence? this sofa is the kind that you can build the other decor for the room around .
decor, room, sofa

What are the keywords in the following sentence? a time lapse shot of the edge of a hill and the clouds drifting above
cloud, hill, shot

What are the keywords in the following sentence? building is in the heart of the city

building, city, heart