Problem: What are the most important words?
A red stuffed bear perched on a tree.
Answer: bear, perch, tree

Problem: What are the most important words?
A scientist is studying his computer and monitor during an experiment.
Answer: computer, monitor, study

Problem: What are the most important words?
fireworks light up the sydney harbour bridge and expressionist structure as part of new year celebrations
Answer:
bridge, part, structure