instruction:
In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
question:
The Vatican Apostolic Library , more commonly known as the Vatican Library or informally as the Vat , is the library of the Holy See , located in Vatican City .
answer:
The Vatican Library is the library of the Holy See .


question:
The option to capture the moved pawn " en passant " must be exercised on the move immediately following the double-step pawn advance , or it is lost for the remainder of the game .
answer:
To capture " en passant " can only be done on the move right after the double-square pawn advance .


question:
A cathedral is a church that contains the " cathedra " of a bishop , thus serving as the central church of a diocese , conference , or episcopate .
answer:

A cathedral is a Christian church that is the seat of a Bishop .