 Complete the following phrase:  Many abandoned towns and settlements in the former Soviet Union were established near Gulag concentration camps to supply necessary services. Since most of these camps were abandoned in the 1950s, the towns were abandoned as well. One such town is located near the former Gulag camp called Butugychag also called Lower Butugychag. Other towns were deserted due to deindustrialisation and the economic crises of the early 1990s attributed to post-Soviet conflicts  one example being Tkvarcheli in Georgia, a coal mining town that suffered a drastic population decline as a result of the 