Question: Pennsylvania Route 51 (PA 51) is a major state highway in Western Pennsylvania, Century III Mall is located on this road, an ailing enclosed shopping mall located in the southern Pittsburgh suburb of West Mifflin, in Pennsylvania, opened in what year?
Sentence (from "Century III Mall"): From 1996-2011, it was owned and operated by Simon Property Group, and prior to Simon, the Edward J. DeBartolo Corporation, who built the mall.
Relevant evidence: No