Complex sentence: Finally, on December 10,1930 the Ayano-Maysky District was formed and Nelkan was assigned to the new District, though as an administrative unit remained part of the Yakut ASSR until 1932.
Split into simpler sentences: Finally, on December 10,1930 the Ayano-Maysky District was formed and Nelkan was assigned to the new District. As an administrative unit, however, Nelkan remained part of the Yakut ASSR until 1932.