Complex sentence: He was born with an anomaly in his hip joints that impaired his movement, and a clumsiness that earned him the taunts of his siblings and caused his instructors to believe that he would never accomplish much.
Split into simpler sentences: He was born with an anomaly in his hip joints that impaired his movement. The resulting clumsiness caused taunts from Blank's siblings and led his instructors to believe that he would never accomplish much.