Complex sentence: The Stadium at Queen Elizabeth Olympic Park, commonly known as the Olympic Stadium, is a stadium in Stratford, London, England, at Marshgate Lane in the Lower Lea Valley.
Split into simpler sentences: The Stadium at Queen Elizabeth Olympic Park, commonly known as the Olympic Stadium, is a stadium located in Stratford, London, England. It is located at Marshgate Lane in London's Stratford district in the Lower Lea Valley.