Complex sentence: The Wizarding World of Harry Potter was officially announced on May 31,2007, and after a two and a half year construction period, the area officially opened to the public on June 18,2010.
Split into simpler sentences: The Wizarding World of Harry Potter was officially announced on May 31,2007. After a two and a half year construction period, the area officially opened to the public on June 18,2010.