What are the keywords in the following sentence? a town an ancient city in the southwest of country hewn from towering walls of rock
country, rock, southwest, tower, wall

What are the keywords in the following sentence? the referee of the match in action during the third qualifying round
action, referee, round

What are the keywords in the following sentence? how are the theme and central idea developed throughout the text .
develop, idea, text, theme

What are the keywords in the following sentence? A pair of elephants standing in their natural habitat.
elephant, pair, stand