What are the keywords in the following sentence? A clock tower is standing in a city.
city, stand, tower

What are the keywords in the following sentence? the army also paid rich tribute to people on wednesday .
army, pay, tribute

What are the keywords in the following sentence? book tells the moving and controversial story of elephants in a zoo during military conflict .
book, story, tell

What are the keywords in the following sentence? waterfalls flowing in idyllic uncontaminated environment crossing green meadows and boulders in summer
boulder, flow, meadow, summer, waterfall