Complex sentence: Android Froyo is a discontinued version of the Android mobile operating system developed by Google, spanning versions between 2.2 and 2.2.3, unveiled on May 20,2010, during the Google I/O conference.
Split into simpler sentences: Android Froyo is a discontinued version of the Android mobile operating system developed by Google, spanning versions between 2.2 and 2.2.3. Unveiled on May 20,2010, during the Google I/O conference.