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: Consider Input: The Pentagon is the headquarters of the United States Department of Defense .

Output: The Pentagon is the headquarters building of the United States Department of Defense , although as a symbol of the U.S. military , the phrase " The Pentagon " is also often used as a metonym for the Department of Defense and its leadership .

Input: Consider Input: Any object that symbolically resembles a penis may also be referred to as a phallus , or as being " phallic " ( as in ' phallic symbol ' ) .

Output: Any object that symbolically or , more precisely , iconically resembles a penis may also be referred to as a phallus ; however , such objects are more often referred to as being phallic ( as in " phallic symbol " ) .

Input: Consider Input: A Digital Object Identifier ( or DOI ) is a permanent way to identify an online document .
Output: In computing , a digital object identifier ( DOI ) is a persistent identifier or handle used to identify objects uniquely , standardized by the International Organization for Standardization ( ISO ) .