What are the keywords in the following sentence? biological species crawling through grass searching for food
food, grass, search

What are the keywords in the following sentence? a paramilitary soldier verifies a passenger as another stands guard at the international airport .
airport, soldier, stand

What are the keywords in the following sentence? men arriving to a party walking down the red carpet
carpet, party, walk

What are the keywords in the following sentence? Members of the same racing team are grouped together in a professional bike race.
member, race, team