Definition: In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
Input: Why are thier varying opions on the term "black", Context: Black people is a term used in certain countries, often in socially based systems of racial classification or of ethnicity, to describe persons who are perceived to be dark-skinned compared to other given populations. As such, the meaning of the expression varies widely both between and within societies, and depends significantly on context. For many other individuals, communities and countries, "black" is also perceived as a derogatory, outdated, reductive or otherwise unrepresentative label, and as a result is neither used nor defined.
Output:
expression varies widely both between and within societies