Problem: What are the most important words?
A blue plate of chocolate covered donuts on a table.
Answer: chocolate, plate, table

Problem: What are the most important words?
through the trees of a residential street you can see invention under construction for event .
Answer: construction, event, invention

Problem: What are the most important words?
hiker admires the scenery from the summit of mountain the highest mountain
Answer:
admire, hiker, mountain