Complex sentence: The movement for pension reform gained some momentum when the Studebaker Corporation, an automobile manufacturer, closed its plant in 1963; the pension plan was so poorly funded that Studebaker could not afford to provide all employees with their pensions.
Split into simpler sentences: The movement for pension reform gained some momentum when the Studebaker Corporation, an automobile manufacturer, closed its plant in 1963. Its pension plan was so poorly funded that Studebaker could not afford to provide all employees with their pensions.