Problem: What are the most important words?
experts say the worst may be over after oil washed up on beaches across the coast earlier this week
Answer: beach, oil, wash

Problem: What are the most important words?
A brown, black and white dog laying on a sofa.
Answer: dog, lay, sofa

Problem: What are the most important words?
the extra sitting room allows plenty of space for the whole group to spread out
Answer:
allow, room, space