context: Allegheny Health Network (AHN), based in Pittsburgh, is a non-profit, eight-hospital academic medical system with facilities located in Western Pennsylvania and one hospital in Western New York. The second-largest provider of health care in its region and one of the largest providers in Pennsylvania, AHN was formed in 2013 when Highmark Inc., a Pennsylvania-based Blue Cross Blue Shield insurance carrier, purchased the assets of the West Penn Allegheny Health System (WPAHS) and added three more hospitals (Jefferson Hospital in Jefferson Hills, Pa., Saint Vincent Hospital in Erie, Pa., and Westfield Memorial Hospital in Westfield, N.Y.) to its new provider division.[1] Allegheny Health Network was formed to act as the parent company to the WPAHS hospitals and its affiliate hospitals,[2] while Highmark Health today serves as the ultimate parent of AHN, creating one of the nation's largest integrated health delivery and financing systems.[3]
question: When was the Allegheny Health Network formed?
answers.text: 2013 2013 2013