Task: Question Generation
Input (English): Context : CyanogenMod (pronounced /saɪ.ˈæn.oʊ.ˌdʒɛn.mɒd/ or sigh-ah-no-gen-mod), usually abbreviated to CM, is an open-source operating system for smartphones and tablet computers, based on the Android mobile platform. 
Answer : Android
Output (English): The CyanogenMod is based upon what?