Complex sentence: Katrin Mueller-Rottgardt (born January 15,1982) is a German para-track and field athlete who competed in the 2016 Summer Paralympics in the T12/F12 100 metres, 200 metres and long jump.
Split into simpler sentences: Katrin Mueller-Rottgardt (born 15 January 1982) is a German para-track and field athlete. She competed in the 2016 Summer Paralympics in the 100 metres, 200 metres and long jump.