Complex sentence: He has worked with two different trios for a long time; the trio with Christian Weber and Dieter Ulrich and also the trio with Dominique Girod (double bass) and Christian Wolfarth (Percussion).
Split into simpler sentences: He has worked with two different trios for a long time. On one hand, the trio with Christian Weber and on the other hand with Dominique Girod (double bass) and hristian Wolfarth (Percussion).