What are the keywords in the following sentence? modern agriculture with the use of plastic to cover crops
cover, crop, plastic

What are the keywords in the following sentence? circular fun petrol powered boat on the sea
boat, fun, sea

What are the keywords in the following sentence? a race car loses control during a race
control, lose, race

What are the keywords in the following sentence? bridge crosses the creek near the beginning of the trail .
beginning, bridge, cross