What are the keywords in the following sentence? dark threatening sky moving in horizontal shot in the fall
fall, move, sky

What are the keywords in the following sentence? a large amount of luggage sitting out in the snow
luggage, sit, snow

What are the keywords in the following sentence? football player breaks past athlete during the match .
athlete, break, player

What are the keywords in the following sentence? an airplane is flying past a large city
airplane, city, fly