text: PokÃ mon Black and White were released in Japan on September 18 , 2010 , in Europe on March 4 , 2011 , and in North America on March 6 , 2011 .
simplified: The games were released in Japan September 18 , 2010 , in Europe March 4 , 2011 , and in North America March 6 , 2011 .