What are the keywords in the following sentence? palm trees and sky with a passing airplane
airplane, pass, sky

What are the keywords in the following sentence? Skilled snowboarder in bright yellow glides smoothly down a stair rail in the snow.
rail, snow, snowboarder

What are the keywords in the following sentence? city with christmas lights in the shop windows and trees
city, light, tree

What are the keywords in the following sentence? A white plane with a blue and yellow tail sitting on tarmac.
sit, tail, tarmac