Complex sentence: He has been principal organist at the St. Salvator's Cathedral, responsible for the cathedral music in services and the Kathedraalconcerten, a series with a tradition since 1952.
Split into simpler sentences: He has been principal organist at the St. Salvator's Cathedral. Michiels is responsible for the cathedral music in services and the Kathedraalconcerten, a series with a tradition since 1952.