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.
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Question: The Tower of David ( , " Migdal David " , , " Burj Daud " ) is an ancient citadel located in Jaffa Gate of the Old City of Jerusalem .

Answer: The Tower of David ( , " Migda ́ l Davi ́ d " , , " Burj Da ̄ wu ̄ d " ) , also known as the Jerusalem Citadel , is an ancient citadel located near the Jaffa Gate entrance to western edge of the Old City of Jerusalem .


Question: A doorstop ( or door stop or doorstopper ) is a tool .

Answer: A doorstop ( also door stopper , door stop or door wedge ) is an object or device used to hold a door open or closed , or to prevent a door from opening too widely .


Question: The National Security Advisor , officially known as the Assistant to the President for National Security Affairs , serves as the top advisor to the President of the United States on national security issues .

Answer:
The Assistant to the President for National Security Affairs ( APNSA ) , commonly referred to as the National Security Advisor ( NSA ) or at times informally termed the NSC Advisor , is a senior aide in the Executive Office of the President , based at the West Wing of the White House , who serves as the chief in-house advisor to the President of the United States on national security issues .