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?

Context paragraphs:
Pennsylvania Route 837: Pennsylvania Route 837 (PA 837) is a state route located in western Pennsylvania.  The southern terminus of the route is at Pennsylvania Route 88 in the Carroll Township hamlet of Wickerham Manor.  The northern terminus is at U.S. Route 19 and Pennsylvania Route 51 in downtown Pittsburgh at the junction of the Ohio, Allegheny and Monongahela rivers.  The highway parallels the Monongahela River for all of its route with the exceptions of its extreme north and south ends.  Popular amusement park Kennywood is located along this route.

Pennsylvania Route 60: Pennsylvania Route 60 (PA 60) is a state highway located in the western suburbs of Pittsburgh, Pennsylvania, in the United States.  Although the route follows a mostly east–west alignment, it is signed as a north–south highway.  The southern terminus of the route is at a pseudo-interchange with U.S. Route 19 (US 19) and PA 51 in Pittsburgh's West End while the northern terminus is at an interchange with Interstate 376 (I-376), US 22, and US 30 in Robinson Township.  The portion of PA 60 outside of Pittsburgh is known as the Steubenville Pike; within the city, PA 60 follows several different streets.

Pennsylvania Route 51: Pennsylvania Route 51 (PA 51) is a major state highway in Western Pennsylvania.  It runs for 89 mi from Uniontown to the Ohio state line near Darlington, where it connects with Ohio State Route 14.  Route 51 is the termination point for Pennsylvania Route 43, Pennsylvania Route 48 and Pennsylvania Route 88.  Century III Mall is located on this road in West Mifflin.  The Route is a major connection from Uniontown and the rest of Fayette County to Pittsburgh.

Pennsylvania Route 50: Pennsylvania Route 50 (PA 50) is a 32.7 mi state highway located in western Pennsylvania.  The western terminus of the route is at Pennsylvania Route 844 in the Independence Township community of Independence less than a mile from the West Virginia state line.  The eastern terminus is at Pennsylvania Route 60 in Crafton Heights.  Part of its routing used to be Pennsylvania Route 28, which now terminates in the Pittsburgh neighborhood of Crafton Heights.

Pennsylvania Route 65: Pennsylvania Route 65 (PA 65, also known as the 65th Infantry Division Memorial Highway), is a major 51 mi state highway located in western Pennsylvania, United States.  The route, traveling north–south from the Interstate 279/U.S. Route 19 Truck (I-279/US 19 Truck) concurrency in Pittsburgh north to the PA 108/PA 168 concurrency in New Castle, connects downtown Pittsburgh to the northwestern portion of the Pittsburgh Metropolitan Area.  PA 65 is similar in its purpose to PA  18 and PA 51, both of which run parallel to PA 65 at one point or another; however, the three routes pass through different cities for most of their respective alignments.

Century III Mall: Century III Mall is an ailing enclosed shopping mall located in the southern Pittsburgh suburb of West Mifflin, Pennsylvania.  It is the fourth largest shopping mall in the Greater Pittsburgh area.  Opened in 1979, and remodeled in 1997, the three-level mall contains 1290000 sqft of retail space and approximately 25 stores.  Anchor retailers at Century III Mall include Dick's Sporting Goods and J. C. Penney.  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.  It is currently owned and operated by Las Vegas-based Moonbeam Capital Investments LLC.

Pennsylvania Route 48: Pennsylvania Route 48 (PA 48) is an 18.9 mi state highway located in the Pittsburgh, Pennsylvania area.  The route is predominantly a two-lane highway as it runs through McKeesport and other suburbs.  The entire routing of PA 48 is part of the Orange Belt, both reaching their southern termini at Pennsylvania Route 51, southeast of Elizabeth.  Until 1998, the northern terminus of PA 48 was at the intersection of Old Haymaker and Center Roads, about 1/2 mile from its current terminus at U.S. Route 22 Business in Monroeville.

Pennsylvania Route 201: Pennsylvania Route 201 (designated by the Pennsylvania Department of Transportation as State Route 201, abbreviated PA 201) is a 25 mi south-north state highway located in Southwestern Pennsylvania in the counties of Fayette and Westmoreland.  The southern terminus is at U.S. Route 119/PA 711 in Connellsville.  The highway heads northwest and meets up with Pennsylvania Route 51 twice at two separate locations and Interstate 70 in Rostraver Township.  The northern terminus is at Pennsylvania Route 136 in Rostraver Township.

Pennsylvania Route 88: Pennsylvania Route 88 (PA 88) is a 68 mi north–south state highway located in southwestern Pennsylvania.  The southern terminus of the route is at U.S. Route 119 in Point Marion less than 2 mi from the Pennsylvania-West Virginia border.  The northern terminus is at Pennsylvania Route 51 in Pittsburgh.  PA 88 runs parallel to the Monongahela River for almost its entire length.

Pennsylvania Route 588: Pennsylvania Route 588 (PA 588) is an east–west state highway in the Western Pennsylvania counties of Beaver and Butler.  It travels sixteen miles between PA 51 in Chippewa Township, Beaver County and PA 288 in Zelienople.  Other communities through which it passes include the city of Beaver Falls and the borough of Eastvale.

Supporting paragraphs: Pennsylvania Route 51 Century III Mall
Answer: 1979