Complex sentence: Charles King Armstrong is a historian and the Korea Foundation Professor of Korean Studies in the Social Sciences at Columbia University, whose body of works in 2016-2017 became the center of controversy with other Korean studies scholars accusing him of source fabrication and plagiarism.
Split into simpler sentences: Charles King Armstrong is a historian and the Korea Foundation Professor of Korean Studies in the Social Sciences at Columbia University. In 2016-2017 his body of works was met with controversy with several Korean studies scholars accusing him of source fabrication and plagiarism.