Problem: What are the most important words?
A number of benches at the beach and a boat in the sea
Answer: beach, bench, boat

Problem: What are the most important words?
tourist attraction is a fortification built by traders for trade in timber and gold
Answer: build, gold, timber, trade, trader

Problem: What are the most important words?
A Group of hikers resting near a tree.
Answer:
hiker, rest, tree