Complex sentence: The stadium was known as the National Soccer Stadium during international FIFA competitions, including the 2007 FIFA U- 20 World Cup, it also was host to the MLS Cup 2010 on November 21,2010.
Split into simpler sentences: The stadium was known as the National Soccer Stadium during international FIFA competitions, including the 2007 FIFA U- 20 World Cup. It also was host to the MLS Cup 2010 on November 21,2010.