Problem: What are the most important words?
religious leader salutes the crowd as he arrives for his general audience .
Answer: audience, leader, salute

Problem: What are the most important words?
two people sitting near sheep on hay
Answer: hay, sheep, sit

Problem: What are the most important words?
fireworks explode over roman structure as part of the celebrations of anniversary as an unified state
Answer:
celebration, explode, firework, structure