Problem: What are the most important words?
pupils in the third year of a primary school learn in class .
Answer: class, pupil, school

Problem: What are the most important words?
interior of old church in monastery dark interior with rays of light shining through the window
Answer: church, light, ray

Problem: What are the most important words?
how to bake a potato in an oven
Answer:
bake, oven, potato