What are the keywords in the following sentence? water flows over a dam in a tributary .
flow, tributary, water

What are the keywords in the following sentence? a big agricultural machinery is driving on the field and it is turning hay around .
drive, field, hay, machinery, turn

What are the keywords in the following sentence? Al elaborate frosted cake with teddy bear and flowers made out of frosting.
bear, cake, frost

What are the keywords in the following sentence? a calf stands with its mother in its enclosure .
calf, mother, stand