Complex sentence: The situation of Germany's most renowned jazz festival (JazzFest Berlin) is perhaps symptomatic for this: since the 1990s it has been regularly criticised, and its artistic directors fell back on highly elaborate concepts without a clear artistic line being visible.
Split into simpler sentences: The situation of Germany's most renowned jazz festival (JazzFest Berlin) is perhaps symptomatic for this. Since the 1990s it has been regularly criticised, and its artistic directors fell back on highly elaborate concepts without a clear artistic line being visible.