What are the keywords in the following sentence? close up of a bee inside the white and pink peony flower
bee, close, flower

What are the keywords in the following sentence? biological species on sale in market
market, sale, specie

What are the keywords in the following sentence? volcanic activity under meromictic lake produced a cloud of carbon dioxide that asphyxiated villagers
asphyxiate, dioxide, lake, produce, villager

What are the keywords in the following sentence? A woman drives her friend to the mall.
drive, friend, mall