Problem: What are the most important words?
A large group of giraffes roaming around in an enclosure.
Answer: enclosure, giraffes, roam

Problem: What are the most important words?
cat on roof watching for the moon
Answer: cat, moon, watch

Problem: What are the most important words?
the roofs of the temples are usually highly ornamented with mythical creatures .
Answer:
creature, roof, temple