Problem: What are the most important words?
biological species has a flower much larger than apple or cherry blossoms
Answer: apple, blossom, flower

Problem: What are the most important words?
statue of politician atop memorial to soldiers
Answer: memorial, politician, statue

Problem: What are the most important words?
side view of a boeing aircraft on approach to land with landing gear down
Answer:
aircraft, boee, gear, land, view