What are the keywords in the following sentence? imported cars on the dock
car, dock, import

What are the keywords in the following sentence? An Amtrak train slows down as it enters an empty station.
slow, station, train

What are the keywords in the following sentence? the pier disappears in to the fog
disappear, fog, pier

What are the keywords in the following sentence? gold at the end of the rainbow
end, gold, rainbow