Complex sentence: The mall experienced a decline in patronage during the past decade, in part due to losing its anchors, Eaton and Gap and the loss of Caplan Duval, The Source, Canadian Tire, Consumers Distributing, Music World, Steinberg and Miracle Mart.
Split into simpler sentences: The mall experienced a decline in patronage during the past decade, in part due to losing its anchors, Eaton and Gap. Contributing to the decline was the loss of Caplan Duval, The Source, Canadian Tire, Consumers Distributing, Music World, Steinberg and Miracle Mart.