What are the keywords in the following sentence? autumn leaves of biological species turning red in autumn
autumn, leave, specie

What are the keywords in the following sentence? moraine dammed lake is a large glacially formed lake here seen looking towards person and a city
city, dam, lake, moraine

What are the keywords in the following sentence? bees fly to find nectar from the red flowers
bee, flower, fly, nectar

What are the keywords in the following sentence? statue and monument to military commander who fought
commander, monument, statue