What are the keywords in the following sentence? sheep grazing under a stormy grey sky .
graze, sheep, sky

What are the keywords in the following sentence? I hope that horse lying the ground is not dead.
ground, horse, lie

What are the keywords in the following sentence? people strolling over shopping street with a lot of souvenir shops in the evening
evening, street, stroll

What are the keywords in the following sentence? A table filled with greens and lots of vegetables.
green, lot, table