Complex sentence: It was founded in 1974 by several non-governmental organizations "concerned with the tobacco epidemic", including the Canadian Cancer Society, the Heart and Stroke Foundation of Canada, and the Canadian Lung Association.
Split into simpler sentences: It was founded in 1974 by several non-governmental organizations "concerned with the tobacco epidemic". Founding organizations included the Canadian Cancer Society, the Heart and Stroke Foundation of Canada, and the Canadian Lung Association.