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"): Opened in 1979, and remodeled in 1997, the three-level mall contains 1290000 sqft of retail space and approximately 25 stores.
Relevant evidence: Yes