Complex sentence: The increased size of the park enabled the creation of a "Peace Mile": a running circuit that encompasses most of the perimeter of the park, inaugurated in 1985 by world harmony advocate Sri Chinmoy and the then Mayor of Oxford.
Split into simpler sentences: The increased size of the park enabled the creation of a "Peace Mile": a running circuit that encompasses most of the perimeter of the park. The Peace Mile was inaugurated in 1985 by world harmony advocate Sri Chinmoy and the then Mayor of Oxford.