Complex sentence: DOS' 19, WSV, DOS Kampen and FC Assen, however, it was with VV Heerenveen (the previous name of current day SC Heerenveen) where he was chosen to first represent the Dutch national team.
Split into simpler sentences: DOS' 19, WSV, DOS Kampen and FC Assen. However, it was with VV Heerenveen (the previous name of current day SC Heerenveen) where he first was selected to represent the Dutch national team.