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

Example Input: Passage: Blue cheese is blue because of the fungus growing throughout it. Answer: blue
Example Output: What color is the fungus in blue cheese?

Example Input: Passage: As erosion by groundwater continues, the ceiling of a cave may collapse. The rock and soil above it sink into the ground. This forms a sinkhole on the surface. You can see an example of a sinkhole in Figure below . Some sinkholes are big enough to swallow vehicles and buildings. Answer: sinkhole
Example Output: What is formed when the ceiling of an underground cave collapses?

Example Input: Passage: Lipids Lipids include a diverse group of compounds that are united by a common feature. Lipids are hydrophobic ("waterfearing"), or insoluble in water, because they are nonpolar molecules. This is because they are hydrocarbons that include only nonpolar carbon-carbon or carbon-hydrogen bonds. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of lipids called fats. Lipids also provide insulation from the environment for plants and animals (Figure 2.17). For example, they help keep aquatic birds and mammals dry because of their water-repelling nature. Lipids are also the building blocks of many hormones and are an important constituent of the plasma membrane. Lipids include fats, oils, waxes, phospholipids, and steroids. Answer: fat
Example Output:
In what form of lipids cells store energy for long-term use?