Complex sentence: His uniform and sword were on display at the Winnebago County War Memorial building in downtown Rockford, across the street from the Main Library, for several years however these items are not currently on display because the location of these items are not known.
Split into simpler sentences: His uniform and sword were on display at the Winnebago County War Memorial building in downtown Rockford, across the street from the Main Library, for several years. However, these items are not currently on display because the location of these items is not known.