Problem: What are the most important words?
a large yellow moon rises behind trees in a field .
Answer: field, rise, tree

Problem: What are the most important words?
tennis tournament champion who won the gold medal for the competitions
Answer: champion, competition, win

Problem: What are the most important words?
the scenery of the region in large part reflects the relationship between the ethnic minority people and nature .
Answer:
reflect, region, scenery