Complex sentence: Borongan has the biggest and the only shopping mall in Eastern Samar, the Wilsam Uptown Mall opened in 2005, located in Barangay Songco.
Split into simpler sentences: Borongan has the biggest and the only shopping mall in Eastern Samar, Wilsam Uptown Mall. It opened in 2005, and is located in Barangay Songco.