Complex sentence: The Australian of the Year award receives substantial sponsorship from private companies, including a relationship in excess of thirty years with the Commonwealth Bank of Australia, but its close association with the Australian Government ensures that its profile and reputation is significantly enhanced.
Split into simpler sentences: The Australian of the Year award receives substantial sponsorship from private companies, including a relationship in excess of thirty years with the Commonwealth Bank of Australia. The close relationship with the Australian Government ensures that the award's profile and reputation is significantly enhanced.