Complex sentence: In 1963, the town established "The Flower Festival of Brampton", based on the "Rose Festival" of Portland, Oregon in the United States, and began marketing itself as the "Flower Town of Canada".
Split into simpler sentences: In 1963, the town established "The Flower Festival of Brampton", based on the "Rose Festival" of Portland, Oregon in the United States. It began to market itself as the "Flower Town of Canada".