Complex sentence: Feyenoord is one of the most successful clubs in the Netherlands, winning 15 Eredivisie titles, 12 KNVB Cups and 2 Johan Cruyff Shields, having won in the international stage one European Cup, two UEFA Cups and one Intercontinental Cup.
Split into simpler sentences: Feyenoord is one of the most successful clubs in the Netherlands, winning 15 Eredivisie titles, 12 KNVB Cups, and 2 Johan Cruyff Shields. Internationally, it has won one European Cup, two UEFA Cups, and one Intercontinental Cup.