What are the keywords in the following sentence? a rainbow rises over bascule bridge as a storm passes .
pass, rainbow, storm

What are the keywords in the following sentence? a train going down the track beside a large hill
hill, track, train

What are the keywords in the following sentence? container ships at wharf and yachts in a sheltered harbor by a city .
harbor, ship, yacht

What are the keywords in the following sentence? a young girl is seen among a group of migrants washing at a camp earlier today
camp, migrant, wash