What are the keywords in the following sentence? pylon for high voltage electric cables reaching into a blue sky
cable, pylon, sky

What are the keywords in the following sentence? the frame hanging on a wall above a bench and a table with the basic charcoal black frame
bench, hang, wall

What are the keywords in the following sentence? a small window in the roof of a home .
home, roof, window

What are the keywords in the following sentence? mist from the valley allows a double rainbow to appear .
appear, mist, rainbow