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

Input: Consider Input: Passage: Nutrients are substances that the body needs for energy, building materials, and control of body processes. Carbohydrates, proteins, lipids, and water are nutrients needed in relatively large amounts. Vitamins and minerals are nutrients needed in much smaller amounts. Answer: nutrients

Output: What are substances that the body needs for energy, building materials, and control of body processes?

Input: Consider Input: Passage: The last major ice age took place in the Pleistocene. This epoch lasted from 2 million to 14,000 years ago. Earth's temperature was only 5 C (9 F) cooler than it is today. But glaciers covered much of the Northern Hemisphere. In Figure below , you can see how far south they went. Clearly, a small change in temperature can have a big impact on the planet. Humans lived during this ice age. Answer: pleistocene

Output: The last major ice age took place in which era?

Input: Consider Input: Passage: Centrioles are made of short microtubules and are very important in cell division. Answer: short microtubules
Output: What are centrioles made from?