What are the keywords in the following sentence? This seems to be a bear laying on the snow.
bear, lay, snow

What are the keywords in the following sentence? an epiphytic orchid found growing on large trees
find, grow, tree

What are the keywords in the following sentence? shepherds walking a herd of sheep to pasture .
herd, sheep, shepherd

What are the keywords in the following sentence? A piece of pizza in the box with cheese, mushrooms, and onions.
box, cheese, mushroom, onion, pizza