 Complete the following phrase:  In March 2014 Ukraine started to ban several Russian TV channel from broadcast in Ukraine, followed in February 2015 with a ban on showing on Ukrainian television of audiovisual works that contain the popularization, agitation for, propaganda of any action of law enforcement agencies, the armed forces, other armed, military or security forces of the occupier state. One year later Russian productions on Ukrainian television had decreased by 3 to 4 times. In 2015 Ukraine started banning Russian artists from entering Ukraine and banning other Russian works of culture from the country also when they were considered a threat to national security. Following the 