What are the keywords in the following sentence? award winner and automobile make in action during leg of an event .
action, event, winner

What are the keywords in the following sentence? A heart shaped cake with a large knife stuck in the middle.
cake, knife, middle, shape, stick

What are the keywords in the following sentence? a cat with some clouds and clock faces
cat, clock, cloud

What are the keywords in the following sentence? A small flock of grazing sheep in a very large grassland.
grassland, graze, sheep