Complex sentence: He studied in Seoul Arts High School with Jiae Kim and with Prof. Kyung Seun Pee, and then he went to Germany and studied at the Folkwang University of the Arts in Essen with Prof. Arnulf von Arnim.
Split into simpler sentences: He studied in Seoul Arts High School with Jiae Kim and with Prof. Kyung Seun Pee. He had studied at the Folkwang University of the Arts in Essen with Prof. Arnulf von Arnim.