This anti-establishment movement was even supported, although moderately, by the Communist authorities, particularly by the Communist youth organisation which often organized concerts, festivals, parties, exhibitions, and other cultural events. The lyrics that were criticizing and satirizing the flaws of the Yugoslav socialism were considered by the authorities as a "useful and friendly critique" and were often tolerated with certain cases of censorship. Especially the Zagreb-based band Azra, which is known for its political and social criticism in their songs. The Yugoslav new wave scene also cooperated with various conceptual or artistic movements related to pop art, avant-garde etc.