Complex sentence: The 10 winning students, from countries included Peru, Ukraine, India, Korea, Philippines and Canada, were selected by judges after more than 7.7 million votes were cast worldwide between September and December 2009.
Split into simpler sentences: The 10 winning students came from countries that included Peru, Ukraine, India, Korea, Philippines and Canada, and were selected by judges. That was after more than 7.7 million votes were cast worldwide between September and December 2009.