What are the keywords in the following sentence? an ambulance arrives near the scene .
ambulance, arrive, scene

What are the keywords in the following sentence? bulls grazing in the field
bull, field, graze

What are the keywords in the following sentence? a heart shaped plate of fresh strawberries
plate, shape, strawberry

What are the keywords in the following sentence? boxer throws a left to the head of boxer in the first round of contest
boxer, contest, left, round, throw