What are the keywords in the following sentence? sea lions gathering together on a rock
gather, lion, rock

What are the keywords in the following sentence? pilots in the cockpit landing the plane .
land, pilot, plane

What are the keywords in the following sentence? sunflowers for sale at a farmers market
market, sale, sunflower

What are the keywords in the following sentence? football player is in action against athlete during the group g of football match at stadium .
action, athlete, stadium