Antietam National Battlefield
E60135
Antietam National Battlefield is a U.S. National Park Service site in Maryland that preserves the location of the Battle of Antietam, one of the bloodiest and most significant engagements of the American Civil War.
All labels observed (10)
How this entity was disambiguated
This entity first appeared as the object of triple T470779 — 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: Antietam National Battlefield Context triple: [Antietam Creek, near, Antietam National Battlefield]
-
A.
Gettysburg National Military Park
Gettysburg National Military Park is a preserved Civil War battlefield and memorial site commemorating the pivotal 1863 Battle of Gettysburg in Pennsylvania.
-
B.
Manassas National Battlefield Park
Manassas National Battlefield Park is a preserved Civil War battlefield in Virginia that commemorates the First and Second Battles of Bull Run through historic landscapes, monuments, and visitor exhibits.
-
C.
Ball's Bluff Battlefield Regional Park
Ball's Bluff Battlefield Regional Park is a preserved Civil War battlefield and memorial site in Loudoun County, Virginia, commemorating the 1861 Battle of Ball's Bluff along the Potomac River.
-
D.
Kennesaw Mountain National Battlefield Park
Kennesaw Mountain National Battlefield Park is a historic Civil War site and protected natural area in Georgia known for its preserved battlefields, hiking trails, and panoramic views.
-
E.
Princeton Battlefield State Park
Princeton Battlefield State Park is a historic site and public park preserving the location of a pivotal 1777 Revolutionary War battle near Princeton, New Jersey.
- 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: Antietam National Battlefield Target entity description: Antietam National Battlefield is a U.S. National Park Service site in Maryland that preserves the location of the Battle of Antietam, one of the bloodiest and most significant engagements of the American Civil War.
-
A.
Gettysburg National Military Park
Gettysburg National Military Park is a preserved Civil War battlefield and memorial site commemorating the pivotal 1863 Battle of Gettysburg in Pennsylvania.
-
B.
Manassas National Battlefield Park
Manassas National Battlefield Park is a preserved Civil War battlefield in Virginia that commemorates the First and Second Battles of Bull Run through historic landscapes, monuments, and visitor exhibits.
-
C.
Ball's Bluff Battlefield Regional Park
Ball's Bluff Battlefield Regional Park is a preserved Civil War battlefield and memorial site in Loudoun County, Virginia, commemorating the 1861 Battle of Ball's Bluff along the Potomac River.
-
D.
Kennesaw Mountain National Battlefield Park
Kennesaw Mountain National Battlefield Park is a historic Civil War site and protected natural area in Georgia known for its preserved battlefields, hiking trails, and panoramic views.
-
E.
Princeton Battlefield State Park
Princeton Battlefield State Park is a historic site and public park preserving the location of a pivotal 1777 Revolutionary War battle near Princeton, New Jersey.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
United States national battlefield
ⓘ
historic site ⓘ protected area ⓘ |
| area | approximately 3,000 acres ⓘ |
| battleDatePreserved | September 17, 1862 ⓘ |
| category |
American Civil War battlefield
ⓘ
Military history of Maryland ⓘ |
| commemorates |
Confederate soldiers of the Battle of Antietam
ⓘ
Union soldiers of the Battle of Antietam ⓘ |
| country | United States of America ⓘ |
| designation |
National Battlefields
ⓘ
surface form:
U.S. National Battlefield
|
| established | 1933 ⓘ |
| establishedAs |
Antietam National Battlefield
self-linksurface differs
ⓘ
surface form:
Antietam National Battlefield Site
|
| governingBody |
National Park Service
ⓘ
surface form:
U.S. National Park Service
|
| hasFeature |
Antietam National Cemetery
ⓘ
Burnside Bridge ⓘ Dunker Church ⓘ Sunken Road ⓘ The Cornfield ⓘ commemorative markers ⓘ field monuments ⓘ observation tower ⓘ |
| hasFilm | orientation film about the battle ⓘ |
| hasMuseum | exhibits on the Battle of Antietam ⓘ |
| hasVisitorCenter |
Antietam National Battlefield
self-linksurface differs
ⓘ
surface form:
Antietam National Battlefield Visitor Center
|
| listedIn | National Register of Historic Places ⓘ |
| locatedIn |
Antietam Creek
ⓘ
surface form:
Antietam Creek valley
Maryland ⓘ Sharpsburg, Maryland ⓘ Washington County, Maryland ⓘ |
| locatedOnWaterbody | Antietam Creek ⓘ |
| maintainedBy | National Park Service ⓘ |
| managedFrom |
National Capital Region (National Park Service)
ⓘ
surface form:
National Capital Region of the National Park Service
|
| nearestCity | Hagerstown, Maryland ⓘ |
| NRHPType | historic district ⓘ |
| offers |
ranger-led programs
ⓘ
self-guided auto tour ⓘ walking trails ⓘ |
| openToPublic | true ⓘ |
| ownedBy |
United States government
ⓘ
surface form:
United States federal government
|
| partOf |
National Battlefields
ⓘ
surface form:
American Civil War historic sites
|
| preserves |
Antietam National Battlefield
self-linksurface differs
ⓘ
surface form:
Battle of Antietam battlefield
|
| significantEvent | Battle of Antietam ⓘ |
| website | https://www.nps.gov/anti/index.htm ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Antietam National Battlefield Description of subject: Antietam National Battlefield is a U.S. National Park Service site in Maryland that preserves the location of the Battle of Antietam, one of the bloodiest and most significant engagements of the American Civil War.
Referenced by (32)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Antietam Creek
this entity surface form:
Antietam National Battlefield National Historic Landmark
Antietam National Battlefield
→
preserves
→
Antietam National Battlefield
self-linksurface differs
ⓘ
this entity surface form:
Battle of Antietam battlefield
Antietam National Battlefield
→
establishedAs
→
Antietam National Battlefield
self-linksurface differs
ⓘ
this entity surface form:
Antietam National Battlefield Site
Antietam National Battlefield
→
hasVisitorCenter
→
Antietam National Battlefield
self-linksurface differs
ⓘ
this entity surface form:
Antietam National Battlefield Visitor Center
this entity surface form:
U.S. National Register of Historic Places (as part of Antietam National Battlefield)
National Capital Region (National Park Service)
→
hasJurisdictionOver
→
Antietam National Battlefield
ⓘ
this entity surface form:
Antietam National Battlefield historic district
this entity surface form:
Antietam battlefield
this entity surface form:
Antietam National Battlefield historic district
this entity surface form:
Antietam National Battlefield visitor areas
this entity surface form:
monuments at Antietam National Battlefield