Complex sentence: Drummer and composer Klaus Schulze was briefly a member of an early lineup, but the most stable version of the group, during their influential mid- 1970s period, was as a trio with Froese, Christopher Franke, and Peter Baumann.
Split into simpler sentences: Drummer and composer Klaus Schulze was briefly a member of an early lineup. The most stable version of the group, during their influential mid- 1970s period, was as a trio with Froese, Christopher Franke, and Peter Baumann.