What are the keywords in the following sentence? replacing beams for the bridge over the electrified railway
beam, bridge, replace

What are the keywords in the following sentence? small cat eating some leaves of grass
cat, eat, grass

What are the keywords in the following sentence? Numerous head of cattle are grazing in the grass.
cattle, grass, graze, head

What are the keywords in the following sentence? sunrise on the lake in autumn
autumn, lake, sunrise