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.
Problem:A National Historic Landmark District ( NHLD ) is a historic district that is recognized as an NHL .
Solution:
A National Historic Landmark ( NHL ) is a building , district , object , site , or structure that is officially recognized by the United States government for its outstanding historical significance .