What are the keywords in the following sentence? a brown bear starts eating a salmon he just caught
bear, catch, salmon

What are the keywords in the following sentence? A zebra feeding on grass in a pen.
feed, pen, zebra

What are the keywords in the following sentence? head on image of a passenger aircraft departing at international airport
aircraft, airport, depart

What are the keywords in the following sentence? football team clinched football competition with victory over football team in june
competition, team, victory