What are the keywords in the following sentence? A herd of three elephants walking in the wild.
elephant, walk, wild

What are the keywords in the following sentence? of fans dance during day .
dance, day, fan

What are the keywords in the following sentence? cactus growing in the natural world
cactus, grow, world

What are the keywords in the following sentence? oak trees on green meadow at a spring day
meadow, oak, tree