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

Input: Consider Input: Passage: A variable is a factor that can change over the course of an experiment. Independent variables are factors whose values are controlled by the experimenter to determine its relationship to an observed phenomenon (the dependent variable). Dependent variables change in response to the independent variable. Answer: independent variables

Output: The values of which factors are controlled by the experimenter over the course of an experiment?

Input: Consider Input: Passage: The largest known virus, called mimivirus, is so large that scientists first mistook it for a bacterium. It was first discovered in amoeba, in 1992, and was identified as a virus in 2003. Scientists believe that mimivirus may cause certain types of pneumonia in humans. The core contains DNA, with the majority of the DNA in genes, and only 10% DNA of unknown function ("junk" DNA). Answer: mimivirus

Output: What is the largest known virus?

Input: Consider Input: Passage: Winds on Earth are either global or local. Global winds blow in the same directions all the time. They are created when more solar energy strikes the Equator than the polar regions. More about global wind patterns is described in detail in the concept "Global Wind Belts. ". Answer: global winds
Output: What type of winds are created when more solar energy strikes the equator than the polar regions?