Complex sentence: In 2011, the Heritage Cup was to expand to four teams with the entry of the Portland Timbers and Vancouver Whitecaps FC; however, the Timbers and Whitecaps elected not to compete for the cup in 2011.
Split into simpler sentences: In 2011, the Heritage Cup was to expand to four teams with the entry of the Portland Timbers and Vancouver Whitecaps FC. However, the Timbers and Whitecaps elected not to compete for the cup in 2011.