What are the keywords in the following sentence? A train traveling through a desolate desert filled with grass.
fill, grass, train, travel

What are the keywords in the following sentence? work of fiction and art .
art, fiction, work

What are the keywords in the following sentence? A boy looking at stars with a telescope.
look, star, telescope

What are the keywords in the following sentence? flight over the almost deserted streets drone on the road in a fantastic sunrise
desert, road, street