Complex sentence: He studied at the conservatoires of Maastricht, The Hague and Utrecht, where Kees van Baren, Sem Dresden and Henri Geraedts were among his teachers.
Split into simpler sentences: He studied at the conservatories of Maastricht, The Hague and Utrecht. Amongst others, Kees van Baren, Sem Dresden and Henri Geraedts were his teachers.