Identify the premises and conclusions in the following arguments

Identify the premises and conclusions in the following arguments. Underline the indicators and pay special attention to how the indicators connect the statements in each argument.
Nothing can be the cause of itself; for in that case it would have to exist prior to itself, which is impossible.
【正确答案】：Premise: It is impossible for things to exist prior to themselves.
Conclusion: Nothing can be the cause of itself.