What are the keywords in the following sentence? freight train moving by the bridge against blue sky
move, sky, train

What are the keywords in the following sentence? During the race, the car sped around the corner to come in first place.
car, corner, speed

What are the keywords in the following sentence? city in winter with churches and the mosque
church, city, mosque

What are the keywords in the following sentence? A young teenager is having lots of fun with his skateboard.
lot, skateboard, teenager