Problem: What are the most important words?
red squirrel feeding on seeds and nuts while perched on the top of a decaying tree stump
Answer: nut, perch, seed, squirrel, top

Problem: What are the most important words?
adherents pray outside mosque on the second friday of the holy month in the capital
Answer: adherent, friday, mosque, pray

Problem: What are the most important words?
prophet and his brothers depicted on the stained glass window of a church
Answer:
depict, prophet, stain, window