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.
Input: The Greek Orthodox Church of Antioch is a group of Christians .
Output:
The Greek Orthodox Church of Antioch , also known as the Antiochian Orthodox Church and legally as the Greek Orthodox Patriarchate of Antioch and All the East , is an autocephalous Greek Orthodox Church within the wider communion of Eastern Orthodox Christianity .