Complex sentence: From summer 2008 to August 2011, a 4.5 hour passenger tour service travelled the entire GJR track as Grand Junction Express with its own 1950's vintage stainless steel cars but that service was owned by private individuals operating as Destiny Tours.
Split into simpler sentences: From summer 2008 to August 2011, a 4.5 hour passenger tour service travelled the entire Guelph Junction Railway track as the Grand Junction Express with its own 1950's vintage stainless steel cars. The service was owned by private individuals operating as Destiny Tours.