Complex sentence: As a student at the Amsterdam Conservatoire, he gained conducting experience with several concerts by amateur ensembles in Schiedam and Zutphen; he also conducted concerts by the choir of the church of St. Nicholas in Amsterdam.
Split into simpler sentences: As a student at the Amsterdam Conservatoire, he gained conducting experience with several concerts by amateur ensembles in Schiedam and Zutphen. He also conducted concerts by the choir of the church of St. Nicholas in Amsterdam.