sentences:  On weekends, Rurtalbahn runs several tourist trains in the Eifel area such as the BördeExpress.Rurtalbahn has a stake of 50% in the recently founded VIAS GmbH, a railway company servicing the Frankfurt area.In the Düren area, Rurtalbahn runs its trainlines on behalf of Aachener Verkehrsverbund (AVV), the Bördeexpress is run on behalf of IG Rurtalbahn.