Problem: What are the most important words?
ring in sterling silver with diamonds .
Answer: ring, silver, sterle

Problem: What are the most important words?
A cat rests it's front paws on a laptop.
Answer: cat, laptop, paw, rest

Problem: What are the most important words?
A keyboard, a remote control, and two circuit boards with wires, all on top of a map.
Answer:
board, control, keyboard