Pentagon

E1772

building government headquarters office building symbol

The Pentagon is the five-sided headquarters of the United States Department of Defense and a symbol of the U.S. military.

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All labels observed (28)

Label	Occurrences
The Pentagon	247
Pentagon canonical	143
The Pentagon, Arlington, Virginia	8
Pentagon Reservation	7
United States Department of Defense headquarters	6
the Pentagon	6
Pentagon attack site	3
Pentagon, Arlington, Virginia	3
Pentagon (primary headquarters)	2
Pentagon Transit Center	2
U.S. Department of Defense headquarters	2
construction of the Pentagon	2
Office of the Pentagon Reservation	1
Pentagon (United States Department of Defense headquarters)	1
Pentagon (fictional context)	1
Pentagon (primary command center component)	1
Pentagon North Entrance	1
Pentagon Reservation vicinity	1
Pentagon South Entrance	1
Pentagon area of Arlington	1
Pentagon area vicinity	1
Pentagon building design	1
Pentagon site master plan	1
Pentagon tenant organizations	1
The Pentagon Reservation	1
The Pentagon, Arlington, Virginia, United States	1
The Pentagon, Washington, D.C. 20301-1000	1
United States Department of Defense (Pentagon vicinity)	1

How this entity was disambiguated

This entity first appeared as the object of triple T1151 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Pentagon
Context triple: [Washington, D.C., hostsInstitution, Pentagon]

A. United States Capitol
The United States Capitol is the iconic neoclassical building in Washington, D.C., that houses the U.S. Congress and serves as a central symbol of American democracy.
B. White House
The White House is the official residence and primary workplace of the president of the United States, located at 1600 Pennsylvania Avenue in Washington, D.C.
C. Lincoln Memorial
The Lincoln Memorial is a monumental neoclassical temple in Washington, D.C., honoring the 16th U.S. president, Abraham Lincoln, and serving as a symbolic site for American civil rights and national unity.
D. United Nations Headquarters
The United Nations Headquarters is the main administrative and diplomatic center of the UN, where representatives of member states convene to discuss and address global issues.
E. Harry S. Truman National Historic Site
Harry S. Truman National Historic Site is a preserved historic property in Independence, Missouri, that includes the longtime home and related sites associated with the 33rd U.S. president, Harry S. Truman.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Pentagon
Target entity description: The Pentagon is the five-sided headquarters of the United States Department of Defense and a symbol of the U.S. military.

A. United States Capitol
The United States Capitol is the iconic neoclassical building in Washington, D.C., that houses the U.S. Congress and serves as a central symbol of American democracy.
B. White House
The White House is the official residence and primary workplace of the president of the United States, located at 1600 Pennsylvania Avenue in Washington, D.C.
C. Lincoln Memorial
The Lincoln Memorial is a monumental neoclassical temple in Washington, D.C., honoring the 16th U.S. president, Abraham Lincoln, and serving as a symbolic site for American civil rights and national unity.
D. United Nations Headquarters
The United Nations Headquarters is the main administrative and diplomatic center of the UN, where representatives of member states convene to discuss and address global issues.
E. Harry S. Truman National Historic Site
Harry S. Truman National Historic Site is a preserved historic property in Independence, Missouri, that includes the longtime home and related sites associated with the 33rd U.S. president, Harry S. Truman.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	building ⓘ government headquarters ⓘ office building ⓘ symbol ⓘ
address	The Pentagon, Washington, D.C. 20301-1000 ⓘ linked to: Pentagon
architect	George Bergstrom ⓘ
attackDate	2001-09-11 ⓘ
builtDuring	World War II ⓘ
category	Landmarks in Virginia ⓘ United States military installations ⓘ
connectedBy	Pentagon Metro station ⓘ
constructionEndDate	1943-01-15 ⓘ
constructionStartDate	1941-09-11 ⓘ
country	United States of America ⓘ
damagedIn	September 11 attacks ⓘ
engineer	John McShain ⓘ
floorArea	approximately 6200000 square feet ⓘ
hasFeature	central courtyard ⓘ
hasFunction	administrative offices ⓘ military command center ⓘ
hasMemorial	Pentagon Memorial ⓘ
headquartersOf	United States Department of Defense ⓘ linked to: Department of Defense
listedIn	National Register of Historic Places ⓘ
locatedIn	Arlington County, Virginia ⓘ linked to: Arlington, Virginia United States of America ⓘ Virginia ⓘ
near	Potomac River ⓘ
NRHPListingDate	1989-07-02 ⓘ
numberOfCorridors	10 ⓘ
numberOfFloors	5 ⓘ
numberOfRings	5 ⓘ
numberOfSides	5 ⓘ
officeArea	approximately 3700000 square feet ⓘ
openingDate	1943-01-15 ⓘ
operatedBy	United States Department of Defense ⓘ linked to: Department of Defense
ownedBy	United States federal government ⓘ linked to: United States government
PentagonMemorialDedicated	2008-09-11 ⓘ
postalCity	Washington, D.C. ⓘ
reconstructionCompleted	2002 ⓘ
region	Washington metropolitan area ⓘ
shape	pentagon ⓘ
symbolOf	U.S. military ⓘ linked to: United States Armed Forces United States defense establishment ⓘ linked to: Department of Defense
usedBy	United States Air Force ⓘ United States Army ⓘ United States Marine Corps ⓘ United States Navy ⓘ United States Space Force ⓘ

How these facts were elicited

Referenced by (447)

Full triples — surface form annotated when it differs from this entity's canonical label.

Washington, D.C. → hostsInstitution → Pentagon ⓘ

Arlington, Virginia → contains → Pentagon ⓘ

Arlington, Virginia → hosts → United States Department of Defense headquarters ⓘ

linked to: Pentagon

United States Army → headquartersLocation → The Pentagon ⓘ

linked to: Pentagon

National Military Establishment → headquarters → The Pentagon ⓘ

linked to: Pentagon

United States Secretary of Defense → seat → The Pentagon ⓘ

linked to: Pentagon

Potomac River → hasLandmark → The Pentagon ⓘ

linked to: Pentagon

Washington metropolitan area → contains → Pentagon ⓘ

United States Navy → headquartersLocation → The Pentagon ⓘ

linked to: Pentagon

Secretary of the Army → officeLocation → The Pentagon ⓘ

linked to: Pentagon

Northern Virginia → hasLandmark → The Pentagon ⓘ

linked to: Pentagon

Interstate 395 → serves → Pentagon ⓘ

United States Air Force → headquartersLocation → The Pentagon ⓘ

linked to: Pentagon

United States Marine Corps → headquartersFacility → The Pentagon ⓘ

linked to: Pentagon

NME → hasHeadquartersLocation → The Pentagon ⓘ

linked to: Pentagon

Secretary of the Navy → seat → The Pentagon ⓘ

linked to: Pentagon

Munitions Board → headquartersLocation → The Pentagon ⓘ

linked to: Pentagon

SecDef → seat → The Pentagon ⓘ

linked to: Pentagon

Pentagon → address → The Pentagon, Washington, D.C. 20301-1000 ⓘ

linked to: Pentagon

United States Space Force → headquarters → The Pentagon ⓘ

linked to: Pentagon

United States Space Force → garrison → The Pentagon ⓘ

linked to: Pentagon

Joint Chiefs of Staff → headquartersLocation → The Pentagon ⓘ

linked to: Pentagon

Joint Chiefs of Staff → meetsAt → The Pentagon ⓘ

linked to: Pentagon

United States Deputy Secretary of Defense → seat → The Pentagon ⓘ

linked to: Pentagon

United States Armed Forces → headquartersLocation → The Pentagon ⓘ

linked to: Pentagon

Senior Officer of the United States Army → dutyStation → Pentagon ⓘ

Defense Communications Agency → headquartersLocation → Pentagon ⓘ

subject linked to: DCA

Chief of Staff of the Army → seat → The Pentagon ⓘ

linked to: Pentagon

Marine One → landingSite → Pentagon ⓘ

Virginia → hasMajorMilitaryInstallation → Pentagon ⓘ

United States Army Air Forces → garrison → The Pentagon ⓘ

linked to: Pentagon

ASN(RD&A) → locatedIn → Pentagon ⓘ

Chief of Naval Operations → seat → The Pentagon ⓘ

linked to: Pentagon

September 11 attacks → primaryTarget → Pentagon ⓘ

September 11 attacks → locationOfImpact → Pentagon ⓘ

Sergeant Major of the Army → seat → The Pentagon ⓘ

linked to: Pentagon

Air Force Memorial → near → Pentagon ⓘ

Department of the Navy → seat → The Pentagon ⓘ

linked to: Pentagon

Indiana limestone → usedIn → Pentagon ⓘ

Crystal City → near → Pentagon ⓘ

Pentagon Memorial → locatedIn → Pentagon Reservation ⓘ

linked to: Pentagon

Pentagon Memorial → locatedIn → Pentagon ⓘ

United States Department of the Army → headquartersLocation → The Pentagon ⓘ

linked to: Pentagon

United States Department of Defense → headquartersLocation → The Pentagon ⓘ

subject linked to: Department of Defense

linked to: Pentagon

Seal of the United States Department of Defense → associatedWith → Pentagon ⓘ

Pentagon City → adjacentTo → The Pentagon ⓘ

linked to: Pentagon

Pentagon City → associatedWith → Pentagon Reservation ⓘ

linked to: Pentagon

Secretary of the Air Force → seat → The Pentagon ⓘ

linked to: Pentagon

Commandant of the Marine Corps → seat → The Pentagon ⓘ

linked to: Pentagon

Air National Guard → headquartersLocation → The Pentagon, Arlington, Virginia ⓘ

linked to: Pentagon

All labels observed (28)

How this entity was disambiguated Show

Statements (48)

How these facts were elicited Show

Referenced by (447)

How this entity was disambiguated

How these facts were elicited