CBC operates two national television networks (CBC Television and Ici Radio-Canada Télé), four radio networks (CBC Radio One, CBC Radio 2, Ici Radio-Canada Première and Ici Musique) and several cable television channels including two 24-hour news channels (CBC News Network and Ici RDI) in both of Canada's official languages – English and French – and the French-language channels Ici Explora and Ici ARTV, dedicated to science and culture respectively. CBC's national television operations and some radio operations are funded partly by advertisements, in addition to the subsidy provided by the federal government. The cable channels are commercial entities owned and operated by the CBC and do not receive any direct public funds, however, they do benefit from synergies with resources from the other CBC operations. The CBC has frequently dealt with budget cuts and labour disputes, often resulting in a debate about whether the service has the resources necessary to properly fulfill its mandate.