Complex sentence: The Queen opened the 2012 Summer Olympics on 27 July and the Paralympics on 29 August 2012 in London, making her the first head of state to open two Olympic Games in two different countries.
Split into simpler sentences: The Queen opened the 2012 Summer Olympics on 27 July and the Paralympics on 29 August 2012 in London. She is the first head of state to open two Olympic Games in two different countries.