Complex sentence: In 2014, he again won the European championship title in the high bar at the 2014 championship in Sofia, Bulgaria, as well as successfully defended the world title at the World Gymnastics Championships in Nanning, China.
Split into simpler sentences: In 2014, he again won the European championship title in the high bar at the 2014 championship in Sofia, Bulgaria. He also successfully defended the world title at the World Gymnastics Championships in Nanning, China.