Complex sentence: As a result of Dmitriev's activities he was appointed secretary of the Petrozavodsk Commission for Restoring the Rights of Rehabilitated Victims of Political Repression and became a member of the organisation of the same name at the republican level, covering all of Karelia.
Split into simpler sentences: As a result of Dmitriev's activities he was appointed secretary of the Petrozavodsk Commission for Restoring the Rights of Rehabilitated Victims of Political Repression. He also became a member of the organisation of the same name at the republican level, covering all of Karelia.