Complex sentence: From 1999 to 2009 Schreiber was a member on the regional board of the Junge Union Saxony and Lower Silesia, for four of those years he held the position of deputy chairman.
Split into simpler sentences: From 1999 to 2009 Schreiber was a member on the regional board of the Junge Union Saxony and Lower Silesia. For four of those years he held the position of deputy chairman.