Objects in image: Book
Text visible in image: FURNITURE, TABLEO, FOAM, RUBBER, SIMPLIFIES, UPHOLSTERING, coopera, this, article, John, Bergen,, tion, the, simple, furniture, In, high, Spring, old, choge, wwtee, upholster, reailient, foam, and, using, springs, under, thhe, rubber, spring, Zigeer, atrip, form
Question: what are the rubber simplifers made of?
Answers: foam, foam, foam, foam, foam, foam, foam, foam, foam rubber, foam