Complex sentence: Though there were some efforts to preserve the Maupoleum as an example of 1960s architecture, The building, was demolished in 1994 (to the relief of many) by Utrecht company Van Vliet, and generated 11,000 tons of rubble and 700 tons of garbage.
Split into simpler sentences: Though there were some efforts to preserve the Maupoleum as an example of 1960s architecture, the building was demolished in 1994 (to the relief of many). The work was done by Utrecht company Van Vliet, and generated 11,000 tons of rubble and 700 tons of garbage.