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

Example Input: Passage: Over 99 percent of all species that ever lived on Earth have gone extinct. Five mass extinctions are recorded in the fossil record. They were caused by major geologic and climatic events. Evidence shows that a sixth mass extinction is occurring now. Unlike previous mass extinctions, the sixth extinction is due to human actions. Answer: 99%
Example Output: What percentage of all species that ever lived on earth have gone extinct?

Example Input: Passage: Carbohydrates include sugars, starches, and fiber. Sugars and starches are used by the body for energy. One gram of sugar or starch provides 4 Calories of energy. Fiber doesn't provide energy, but it is needed for other uses. At age 13 years, you need about 130 grams of carbohydrates a day. Figure below shows good food sources of each type. Answer: 4
Example Output: How many calories of energy does one gram of sugar or starch provide?

Example Input: Passage: The amount of space matter takes up is its volume . How the volume of matter is measured depends on its state. Answer: volume
Example Output:
What term means the amount of space matter takes up?