Problem: What are the most important words?
pod of dolphins following a fishing boat in the bright blue sea of the coast .
Answer: boat, dolphin, follow

Problem: What are the most important words?
clock tower on stone building against a blue sky
Answer: building, clock, tower

Problem: What are the most important words?
the rising sun obscured behind a cloud as seen from the shore on the island .
Answer:
cloud, shore, sun