Complex sentence: In May 1970, Fedorov participated in the Dymshits-Kuznetsov hijacking affair, was charged for "treason", sentenced to fifteen years in prison and served the full term.
Split into simpler sentences: In May 1970, Fedorov participated in the Dymshits-Kuznetsov hijacking affair, was arrested for "treason". Fedorov was sentenced to fifteen years in prison and served the full term.