Ladd's Addition
E519227
Ladd's Addition is a historic, early 20th-century residential neighborhood in Portland, Oregon, known for its distinctive diagonal street grid, central rose garden, and well-preserved Craftsman and bungalow-style homes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ladd's Addition canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5437319 — 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: Ladd's Addition Context triple: [Inner Southeast Portland, containsNeighborhood, Ladd's Addition]
-
A.
Sumas
Sumas is a small border town in northwestern Washington State, located adjacent to Canada and known as a key U.S.–Canada crossing point.
-
B.
Napier's bones
Napier's bones are a manually operated calculating device using numbered rods to simplify and speed up multiplication and division.
-
C.
Addizione Erculea
Addizione Erculea is a Renaissance urban expansion plan that transformed Ferrara into one of the first modern planned cities in Europe.
-
D.
Prutenic Tables
The Prutenic Tables were influential 16th-century astronomical tables based on Copernican heliocentric theory, used for predicting planetary positions before being superseded by more accurate works like the Rudolphine Tables.
-
E.
Sum It Up
Sum It Up is the memoir of legendary basketball coach Pat Summitt, chronicling her life, career, and impact on women's sports.
- 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: Ladd's Addition Target entity description: Ladd's Addition is a historic, early 20th-century residential neighborhood in Portland, Oregon, known for its distinctive diagonal street grid, central rose garden, and well-preserved Craftsman and bungalow-style homes.
-
A.
Sumas
Sumas is a small border town in northwestern Washington State, located adjacent to Canada and known as a key U.S.–Canada crossing point.
-
B.
Napier's bones
Napier's bones are a manually operated calculating device using numbered rods to simplify and speed up multiplication and division.
-
C.
Addizione Erculea
Addizione Erculea is a Renaissance urban expansion plan that transformed Ferrara into one of the first modern planned cities in Europe.
-
D.
Prutenic Tables
The Prutenic Tables were influential 16th-century astronomical tables based on Copernican heliocentric theory, used for predicting planetary positions before being superseded by more accurate works like the Rudolphine Tables.
-
E.
Sum It Up
Sum It Up is the memoir of legendary basketball coach Pat Summitt, chronicling her life, career, and impact on women's sports.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
historic district
ⓘ
residential neighborhood ⓘ streetcar suburb ⓘ |
| addedToNationalRegisterOfHistoricPlaces | 1988 ⓘ |
| bicycleFriendly | true ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| designedBy | William S. Ladd ⓘ |
| developmentBegan | 1890s ⓘ |
| era | early 20th century ⓘ |
| governedBy |
City of Portland
ⓘ
linked to:
Portland
|
| hasArchitecturalStyle |
Bungalow
ⓘ
Colonial Revival ⓘ Craftsman ⓘ Mission Revival ⓘ Prairie School ⓘ |
| hasBuildingType |
duplexes
ⓘ
single-family houses ⓘ small apartment buildings ⓘ |
| hasCulturalValue | representative of early 20th-century middle-class housing in Portland ⓘ |
| hasFeature |
central rose garden
ⓘ
four diamond-shaped rose gardens ⓘ traffic circles ⓘ tree-lined streets ⓘ |
| hasGreenSpace | Ladd Circle Park and Rose Gardens ⓘ |
| hasLandscapeDesign | formal rose gardens integrated into street plan ⓘ |
| hasLandUse | predominantly low-density residential ⓘ |
| hasPlanFeature | central traffic circle at Ladd Circle ⓘ |
| hasPlanningConcept | diagonal avenues intersecting orthogonal streets ⓘ |
| hasStreetPlan | diagonal street grid ⓘ |
| hasUrbanForm | planned subdivision ⓘ |
| heritageDesignation |
National Register of Historic Places historic district
ⓘ
linked to:
National Register of Historic Places
|
| isTouristAttraction | true ⓘ |
| knownFor |
distinctive diagonal street layout within Portland’s grid
ⓘ
historic rose gardens ⓘ well-preserved early 20th-century houses ⓘ |
| locatedIn |
Portland, Oregon
ⓘ
linked to:
Portland
Southeast Portland ⓘ |
| locatedInAdministrativeEntity |
Multnomah County, Oregon
ⓘ
linked to:
Multnomah County
|
| majorDevelopmentPeriod | 1905–1930 ⓘ |
| namedAfter | William S. Ladd ⓘ |
| partOf |
Buckman neighborhood
ⓘ
Hosford-Abernethy neighborhood ⓘ |
| preservationStatus | well-preserved historic neighborhood ⓘ |
| transportationEra | streetcar era ⓘ |
| urbanDesignSignificance | one of Portland’s earliest planned residential developments ⓘ |
| zoningType | primarily residential ⓘ |
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: Ladd's Addition Description of subject: Ladd's Addition is a historic, early 20th-century residential neighborhood in Portland, Oregon, known for its distinctive diagonal street grid, central rose garden, and well-preserved Craftsman and bungalow-style homes.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.