Complex sentence: The School was founded in 1959 by Celia Franca and was directed for many years by co-founder Betty Oliphant to train dancers primarily for the National Ballet of Canada, but also for companies across Canada and around the world.
Split into simpler sentences: The School was founded in 1959 by Celia Franca and was directed for many years by co-founder Betty Oliphant to train dancers for the National Ballet of Canada. Canada's National Ballet School was founded in 1959 by Celia Franca and Betty Oliphant to train professional dancers for companies across Canada and around the world.