 Complete the following phrase:  Sabrina Mockenhaupt born 6 December 1980 in Siegen is a German long-distance runner who specialises in track events and the marathon. She is a two-time winner of the Cologne Marathon and has also won the Frankfurt Marathon and the Berlin Half Marathon. She represented Germany at the 2004, 2008 and 2012 Summer Olympics and was the 3000 metres bronze medallist at the 