Complex sentence: RTÉ is funded partly by the licence fee, the remainder of the funding is provided by commercial advertising, because RTÉ is funded partly by the licence fee it shows considerably fewer advertisements than most other channels available in Ireland.
Split into simpler sentences: RTÉ is funded partly by the licence fee, the remainder of the funding is provided by commercial advertising. Because RTÉ is funded partly by the licence fee it shows considerably fewer advertisements than most other channels available in Ireland.