What are the keywords in the following sentence? A train coming around a curve on train tracks.
curve, track, train

What are the keywords in the following sentence? A brown horse biting the head of a black horse.
bite, head, horse

What are the keywords in the following sentence? cows chained to some poles while eating some grass in the barn
barn, cow, eat, grass

What are the keywords in the following sentence? golfers walk the fairway during the first round .
fairway, golfer, round, walk