Complex sentence: Eventhough the band kept working together successfully, a small creative core had evolved as time went by consisting of Oliver Rüsing and keyboardist Berthold Fehmer due the fact that all other band members also commited themselves to other musical projects besides Karibow.
Split into simpler sentences: Eventhough the band kept working together successfully, a small creative core had evolved as time went by. It consisted of Oliver Rüsing and keyboardist Berthold Fehmer due the fact that all other band members also commited themselves to other musical projects besides Karibow.