Problem: What are the most important words?
a small tarn located near the summit of haystacks
Answer: locate, summit, tarn

Problem: What are the most important words?
light passes through the stained glass windows at the church
Answer: church, light, pass, stain, window

Problem: What are the most important words?
sailor moves cargo during a vertical replenishment as a helicopter assigned
Answer:
assign, cargo, helicopter, replenishment