What are the keywords in the following sentence? planes parked at an airport
airport, park, plane

What are the keywords in the following sentence? colorful hill rising above a peaceful lake
hill, lake, rise

What are the keywords in the following sentence? Train at a train station on a clear day in a city.
day, station, train

What are the keywords in the following sentence? healthy teeth starts with feeding your family the right kind of meals
family, feed, meal