Answer:
What is black when it's clean and white when it's dirty?
I am a rock group with four members all of whom died in plane crashes. Who am I?
In Paris but not in France the thinnest of its siblings.
I was was before was was was.
I am a cold man without a soul. If there is warmth in me, it slowly will kill me. What am I?
The answer I give is yes, but what I mean is no. What was the question?