Complex sentence: He teaches at Studio Incamminati in Philadelphia which was founded and headed by the late renowned painter, Nelson Shanks and the Art League in Alexandria, Virginia, and also holds painting and sculpture workshops in locations throughout the United States and abroad.
Split into simpler sentences: He teaches at Studio Incamminati in Philadelphia, which was founded and headed by the late renowned painter Nelson Shanks, and the Art League in Alexandria, Virginia. He also holds painting and sculpture workshops in locations throughout the United States and abroad.