Detailed Instructions: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: An antipope is a pretender who falsely claims to be pope or who wrongly opposes the legitimate and recognized pope .
A:
An antipope is a person who , in opposition to the one who is generally seen as the legitimately elected pope , makes a significantly accepted competing claim to be the pope , the Bishop of Rome , and leader of the Roman Catholic Church .