Complex sentence: The women's road race, one of the cycling events at the 2012 Olympic Games in London, took place on 29 July over a course starting and ending on The Mall and heading out of London into Surrey.
Split into simpler sentences: The women's road race, a part of the cycling events at the 2012 Summer Olympics, took place on 29 July in London. The road racing took place over a course starting and ending in The Mall and heading into Surrey.