There also were qualitative changes in the South Korean media. The "Christian Broadcasting System", a radio network, again began to broadcast news as well as religious programming in 1987. In the same year, the government partially lifted a long-standing ban on the works of North Korean artists and musicians, many of whom were of South Korean origin. A newspaper run by dissident journalists began publication in 1988. A number of other new dailies also appeared in 1988. Many of the new weekly and monthly periodicals bypassed the higher profits of the traditional general circulation magazines to provide careful analyses of political, economic, and national security affairs to smaller, specialised audiences. Observers noted a dramatic increase in press coverage of previously taboo subjects such as political- military relations, factions within the military, the role of security agencies in politics, and the activities of dissident organisations. Opinion polls dealing with these and other sensitive issues also began to appear with increasing regularity. Journalists at several of the Seoul dailies organised trade unions in late 1987 and early 1988 and began to press for editorial autonomy and a greater role in newspaper management.