What are the keywords in the following sentence? A train is on the tracks next to buildings.
building, track, train

What are the keywords in the following sentence? model a classic muscle car for sale
car, model, sale

What are the keywords in the following sentence? red flowers on a balcony with modern building and cloudy sky
building, flower, sky

What are the keywords in the following sentence? passengers boarding a flight in the rain
board, flight, passenger