question: What is used to smooth wood?
choices.text: hairs cilia feedback lamphreys sandpaper pulp keratin fluid
choices.label: A B C D E F G H
fact2: Scrap wood can be used for cheap wooden bins.
combinedfact: Sandpaper is used to smooth objects made of wood.
formatted_question: What is used to smooth wood? (A) hairs (B) cilia (C) feedback (D) lamphreys (E) sandpaper (F) pulp (G) keratin (H) fluid