Complex sentence: He was placed on a job in the Newspaper Soviet Russia, the Magazine Rabotnitsa, the Sobesednik Weekly (12) and up to 1988 he was a correspondent of Ogoniok Magazine (13) (14) (15).
Split into simpler sentences: He was placed on a job in the Newspaper Soviet Russia. Up to 1988 he was a correspondent of Ogoniok Magazine (13) (14) (15).