Complex sentence: Arbitration between the company and its employees by the Indiana Public Service Commission resulted in a decision mostly favoring the company, but permitted the employees to unionize, and guaranteed wage increases, a minimum monthly salary, and certain days off work.
Split into simpler sentences: Arbitration between the company and its employees by the Indiana Public Service Commission resulted in a decision mostly favoring the company. The employees were permitted to unionize, guaranteed wage increases, a minimum monthly salary, and certain days off work.