Complex sentence: Human rights can be classified and organized in a number of different ways, at an international level the most common categorisation of human rights has been to split them into civil and political rights, and economic, social and cultural rights.
Split into simpler sentences: Human rights can be classified and organized in a number of different ways. At an international level the most common categorisation of human rights has been to split them into civil and political rights, and economic, social and cultural rights.