Mount Airy, Prince George's County, Maryland
E810099
Mount Airy in Prince George's County, Maryland is a historic plantation estate best known as the birthplace and family home of Eleanor Calvert, who married John Parke Custis, the stepson of George Washington.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mount Airy, Prince George's County, Maryland canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T9610110 — 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: Mount Airy, Prince George's County, Maryland Context triple: [Eleanor Calvert, birthPlace, Mount Airy, Prince George's County, Maryland]
-
A.
Mount Airy, Maryland
Mount Airy, Maryland is a small town in central Maryland known for its historic downtown, scenic rural surroundings, and location along the border of several counties including Frederick County.
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B.
Mechanicsville, Maryland
Mechanicsville, Maryland is an unincorporated rural community in St. Mary's County known for its agricultural character and role as a residential area within Southern Maryland.
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C.
Hampstead, Maryland
Hampstead, Maryland is a small town in northern Maryland known for its suburban residential character and proximity to both rural farmland and the Baltimore metropolitan area.
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D.
Forestville, Maryland
Forestville, Maryland is a suburban community in Prince George's County, just outside Washington, D.C., known for its residential neighborhoods and proximity to major highways and federal facilities.
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E.
Cabin John, Maryland
Cabin John, Maryland is a small unincorporated community in Montgomery County, just outside Washington, D.C., known for its residential neighborhoods, proximity to the Potomac River, and access to Cabin John Regional Park.
- 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: Mount Airy, Prince George's County, Maryland Target entity description: Mount Airy in Prince George's County, Maryland is a historic plantation estate best known as the birthplace and family home of Eleanor Calvert, who married John Parke Custis, the stepson of George Washington.
-
A.
Mount Airy, Maryland
Mount Airy, Maryland is a small town in central Maryland known for its historic downtown, scenic rural surroundings, and location along the border of several counties including Frederick County.
-
B.
Mechanicsville, Maryland
Mechanicsville, Maryland is an unincorporated rural community in St. Mary's County known for its agricultural character and role as a residential area within Southern Maryland.
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C.
Hampstead, Maryland
Hampstead, Maryland is a small town in northern Maryland known for its suburban residential character and proximity to both rural farmland and the Baltimore metropolitan area.
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D.
Forestville, Maryland
Forestville, Maryland is a suburban community in Prince George's County, just outside Washington, D.C., known for its residential neighborhoods and proximity to major highways and federal facilities.
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E.
Cabin John, Maryland
Cabin John, Maryland is a small unincorporated community in Montgomery County, just outside Washington, D.C., known for its residential neighborhoods, proximity to the Potomac River, and access to Cabin John Regional Park.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
birthplace
ⓘ
historic estate ⓘ historic plantation house ⓘ |
| alsoKnownAs |
Mount Airy Estate
ⓘ
Mount Airy Plantation ⓘ |
| architecturalStyle | Georgian architecture ⓘ |
| associatedWith |
Calvert family
ⓘ
Eleanor Calvert ⓘ George Washington ⓘ John Parke Custis ⓘ |
| birthplaceOf | Eleanor Calvert ⓘ |
| builtFor | Calvert family ⓘ |
| category |
Historic house museums in Maryland
ⓘ
Houses in Prince George's County, Maryland ⓘ Plantation houses in Maryland ⓘ |
| connectedByMarriageTo |
Custis family
ⓘ
Washington family ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| era | colonial period ⓘ |
| familyHomeOf | Eleanor Calvert ⓘ |
| hasFeature |
central block with flanking wings
ⓘ
historic outbuildings ⓘ symmetrical façade ⓘ |
| hasFunction | country estate ⓘ |
| hasHistoricDesignation | listed on the National Register of Historic Places ⓘ |
| hasHistoricOwner |
Calvert family of Maryland
ⓘ
linked to:
Calvert family
|
| hasLandscapeType | plantation grounds ⓘ |
| hasMaterial | brick ⓘ |
| hasNumberOfStories | 2 ⓘ |
| heritageStatus | historic site ⓘ |
| historicUse |
plantation
ⓘ
tobacco plantation ⓘ |
| locatedIn |
Maryland
ⓘ
Prince George's County, Maryland ⓘ
linked to:
Prince George’s County, Maryland
United States ⓘ
linked to:
United States of America
|
| locatedInFormerColony | Province of Maryland ⓘ |
| locatedNear |
Rosaryville, Maryland
ⓘ
linked to:
Forestville, Maryland
|
| nearestCity | Upper Marlboro, Maryland ⓘ |
| notableFor |
being the birthplace of Eleanor Calvert
ⓘ
being the family home of Eleanor Calvert ⓘ its connection to George Washington through marriage ⓘ |
| notToBeConfusedWith |
Mount Airy, Carroll County, Maryland
ⓘ
linked to:
Mount Airy, Maryland
|
| openToPublic | partially ⓘ |
| region | Southern Maryland ⓘ |
| significance | example of 18th-century plantation architecture in Maryland ⓘ |
| state | Maryland ⓘ |
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: Mount Airy, Prince George's County, Maryland Description of subject: Mount Airy in Prince George's County, Maryland is a historic plantation estate best known as the birthplace and family home of Eleanor Calvert, who married John Parke Custis, the stepson of George Washington.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.