Problem: What are the most important words?
solar panels produce energy from the sun with blue sky
Answer: panel, sky, sun

Problem: What are the most important words?
half of this box has six doughnuts in it and the other half has a mouse
Answer: box, doughnut, mouse

Problem: What are the most important words?
the twin cities are joined by the this railroad bridge built
Answer:
bridge, build, city