Since the Communities are based on the concept of "language" and language is "dependent on the individual", a number of other powers are obviously associated with the Communities. The Community has powers for culture (theatre, libraries, audiovisual media, etc.), education, the use of languages and matters relating to the individual which concern on the one hand health policy (curative and preventive medicine) and on the other hand assistance to individuals (protection of youth, social welfare, aid to families, immigrant assistance services, etc.) They also have powers in the field of scientific research in relation to their powers and international relations associated with their powers.