Given a scientific passage and an answer, generate a question for the given answer.

Input: Consider Input: Passage: Oxygen has the second highest electronegativity of any element; consequently, it prefers to share or accept electrons from other elements. Only with fluorine does oxygen form compounds in positive oxidation states. Answer: positive oxidation states

Output: Oxygen has the second highest electronegativity of any element; consequently, it prefers to share or accept electrons from other elements. only with fluorine does oxygen form compounds in this?

Input: Consider Input: Passage: Sliding friction is friction that acts on objects when they are sliding over a surface. Sliding friction is weaker than static friction. That's why it's easier to slide a piece of furniture over the floor after you start it moving than it is to get it moving in the first place. Sliding friction can be useful. For example, you use sliding friction when you write with a pencil. The pencil "lead" slides easily over the paper, but there's just enough friction between the pencil and paper to leave a mark. Answer: sliding friction

Output: What type of friction is friction that acts on objects when they are sliding over a surface?

Input: Consider Input: Passage: The outer ear includes the pinna, ear canal, and eardrum. Answer: outer
Output: The eardrum is part of what part of the ear?