Problem: What are the most important words?
tug boat towing barges full of containers
Answer: barge, boat, tow

Problem: What are the most important words?
Two people, strapped together, hanging from a parachute, land on the ground.
Answer: ground, hang, parachute

Problem: What are the most important words?
Two children are playing in the yard and one has hula hoops around him.
Answer:
hoop, hula, yard