What are the keywords in the following sentence? old surrounding wall at a fortress made of stones with lichen in black and white
fortress, stone, wall

What are the keywords in the following sentence? wife of astronaut lays flowers near grave of astronaut
flower, lay, wife

What are the keywords in the following sentence? firefighters work to extinguish a fire at a home as they battle a wildfire
battle, extinguish, fire, firefighter, wildfire

What are the keywords in the following sentence? every flower is a soul blossoming in nature
flower, nature, soul