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

Example Input: Passage: Hinge Joint. The knee joint is a hinge joint. Like a door hinge, a hinge joint allows backward and forward movement. Answer: hinge joint
Example Output: What type of joint is the knee joint?

Example Input: Passage: Each hemisphere of the cerebrum is divided into four parts, called lobes. The four lobes are the:. Answer: 4
Example Output: How many lobes is each hemisphere of the cerebrum divided into?

Example Input: Passage: Citric acid is a large carboxylic acid with three ionizable hydrogen atoms. It is found in citrus fruits and gives them their sour or tart flavor. Answer: citric acid
Example Output:
What large carboxylic acid with three ionizable hydrogen atoms gives some fruits a sour or tart flavor?