Complex sentence: He also cooperated with a number of Czech dissident organisations in the West, helping to disseminate information about communist oppression in Czechoslovakia, and from 1989 Čulík worked as an investigative journalist for the Czech service of Radio Free Europe.
Split into simpler sentences: He also cooperated with a number of Czech dissident organisations in the West, helping to disseminate information about communist oppression in Czechoslovakia. Beginning in 1989, Čulík worked as an investigative journalist for the Czech service of Radio Free Europe.