"Not that I am aware of." Piotr didn't think the City cared about things like that. "Not that I have thought of this before."
Maybe there was something somewhere. Maybe there was a giant database of all of them. He did not think that anybody would like it much if there was. He was certainly displeased with the idea of it.
"We are brought here to live, not be an experiment. But we are not always real in the worlds that others come from. I may be a comic book hero in yours."