What are the keywords in the following sentence? football player smiles during a press conference to announce his new contract at the stadium .
announce, contract, player

What are the keywords in the following sentence? Cows are on either side of a fence in a green pasture.
cow, fence, pasture, side

What are the keywords in the following sentence? A pair of people playing tennis on a court.
court, pair, tennis

What are the keywords in the following sentence? Two doctors are having lunch at the cafe.
cafe, doctor, lunch