What are the keywords in the following sentence? new study shows how trees clean the air
air, clean, tree

What are the keywords in the following sentence? ruins of the fortress and temple
fortress, ruin, temple

What are the keywords in the following sentence? field of sunflowers in full bloom on a clear summer day
day, field, sunflower

What are the keywords in the following sentence? A 30 story gold statue has come to life and is terrorizing New York.
come, life, statue