What are the keywords in the following sentence? man trying to listen with a cupped hand on his ear
ear, hand, listen

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, tower, town, wall

What are the keywords in the following sentence? one of many species of biological order perched in the grasses along shore
perch, shore, specie

What are the keywords in the following sentence? military commanders salute troops during parades at the celebrations
commander, salute, troop