Ladd's Addition Historic District
E519228
Ladd's Addition Historic District is a historic residential neighborhood in Portland, Oregon, known for its distinctive diagonal street grid, central rose gardens, and early 20th-century homes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ladd's Addition Historic District canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5437321 — 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 Historic District Context triple: [Inner Southeast Portland, containsLandmarkArea, Ladd's Addition Historic District]
-
A.
Hackleman Historic District
Hackleman Historic District is a residential neighborhood in Albany, Oregon, known for its concentration of late 19th- and early 20th-century homes that reflect the city’s early development.
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B.
Paradise Historic District
Paradise Historic District is a nationally recognized historic area within Mount Rainier National Park known for its early 20th-century park architecture and scenic alpine setting.
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C.
Heritage Hill Historic District
Heritage Hill Historic District is a historic residential neighborhood in Burlington, Iowa, known for its well-preserved 19th-century architecture and its reflection of the city’s early prosperity along the Mississippi River.
-
D.
Reading Center Historic District
The Reading Center Historic District is a preserved area in downtown Reading, Massachusetts, known for its concentration of 19th- and early 20th-century civic, commercial, and religious buildings that reflect the town’s historical development.
-
E.
Hillsborough Historic District
Hillsborough Historic District is a preserved area in Hillsborough, North Carolina, known for its well-maintained 18th- and 19th-century architecture and its significance in early American and state history.
- 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 Historic District Target entity description: Ladd's Addition Historic District is a historic residential neighborhood in Portland, Oregon, known for its distinctive diagonal street grid, central rose gardens, and early 20th-century homes.
-
A.
Hackleman Historic District
Hackleman Historic District is a residential neighborhood in Albany, Oregon, known for its concentration of late 19th- and early 20th-century homes that reflect the city’s early development.
-
B.
Paradise Historic District
Paradise Historic District is a nationally recognized historic area within Mount Rainier National Park known for its early 20th-century park architecture and scenic alpine setting.
-
C.
Heritage Hill Historic District
Heritage Hill Historic District is a historic residential neighborhood in Burlington, Iowa, known for its well-preserved 19th-century architecture and its reflection of the city’s early prosperity along the Mississippi River.
-
D.
Reading Center Historic District
The Reading Center Historic District is a preserved area in downtown Reading, Massachusetts, known for its concentration of 19th- and early 20th-century civic, commercial, and religious buildings that reflect the town’s historical development.
-
E.
Hillsborough Historic District
Hillsborough Historic District is a preserved area in Hillsborough, North Carolina, known for its well-maintained 18th- and 19th-century architecture and its significance in early American and state history.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
National Register of Historic Places listing
ⓘ
historic district ⓘ residential neighborhood ⓘ |
| architecturalStyle |
Bungalow
ⓘ
Colonial Revival ⓘ Craftsman ⓘ Mission Revival NERFINISHED ⓘ Prairie School NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| developedAs | streetcar suburb ⓘ |
| era | early automobile era neighborhood ⓘ |
| governedBy | City of Portland planning regulations ⓘ |
| hasAmenity |
public rose gardens
ⓘ
sidewalk network ⓘ street trees ⓘ |
| hasBuildingType |
duplexes
ⓘ
single-family houses ⓘ small multifamily buildings ⓘ |
| hasConservationStatus | local historic district protections ⓘ |
| hasCulturalSignificance | represents early 20th-century middle-class housing in Portland ⓘ |
| hasFeature |
central rose gardens
ⓘ
interior rose gardens ⓘ small neighborhood parks ⓘ traffic circles ⓘ tree-lined streets ⓘ |
| hasLandscapeDesign | formal rose gardens in traffic circles ⓘ |
| hasLandUse | primarily residential ⓘ |
| hasPlanFeature |
central traffic circle
ⓘ
diagonal avenues ⓘ orthogonal side streets ⓘ radial layout ⓘ |
| hasPlanningSignificance | early example of planned residential subdivision in Portland ⓘ |
| hasStreetPlan | diagonal street grid ⓘ |
| hasZoning | residential zoning ⓘ |
| knownFor |
distinctive diagonal street grid
ⓘ
early 20th-century homes ⓘ formal rose gardens ⓘ planned residential design ⓘ |
| listedOn | National Register of Historic Places ⓘ |
| locatedIn |
Multnomah County
ⓘ
surface form:
Multnomah County, Oregon
Portland, Oregon NERFINISHED ⓘ Southeast Portland NERFINISHED ⓘ |
| namedAfter | William S. Ladd NERFINISHED ⓘ |
| partOf |
Portland historic resources inventory
NERFINISHED
ⓘ
city of Portland NERFINISHED ⓘ |
| periodOfConstruction | early 20th century ⓘ |
| transportationContext | served historically by streetcar lines ⓘ |
| urbanDesignType | planned residential subdivision ⓘ |
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 Historic District Description of subject: Ladd's Addition Historic District is a historic residential neighborhood in Portland, Oregon, known for its distinctive diagonal street grid, central rose gardens, and early 20th-century homes.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.