What are the keywords in the following sentence? hiking trail leading over a bridge
bridge, lead, trail

What are the keywords in the following sentence? a guard dog protects a boy and his home in a slum
dog, home, protect

What are the keywords in the following sentence? A casserole covered in foil is inside an oven.
cover, foil, oven

What are the keywords in the following sentence? a moose in the distance walks along the side of a lake
lake, moose, side