Portland Expo Building
E24857
The Portland Expo Building is a historic multi-purpose arena in Portland, Maine, best known today as the home court of the NBA G League’s Maine Celtics.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Portland Expo Building canonical | 2 |
| Portland Exposition Building | 1 |
| Portland Exposition complex | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T195109 — 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: Portland Expo Building Context triple: [Maine Celtics, homeVenue, Portland Expo Building]
-
A.
Portland City Hall
Portland City Hall is the historic municipal building in downtown Portland, Oregon, that houses the offices and chambers of the city’s government.
-
B.
Smith Tower
Smith Tower is a historic early-20th-century skyscraper in downtown Seattle, once one of the tallest buildings in the United States and a prominent feature of the city's skyline.
-
C.
Palace of Fine Arts
The Palace of Fine Arts is a monumental Beaux-Arts structure in San Francisco originally built for the 1915 Panama–Pacific International Exposition and now a popular cultural and scenic landmark.
-
D.
Space Needle
The Space Needle is an iconic futuristic observation tower in Seattle, Washington, and a symbol of the city's skyline and the 1962 World's Fair.
-
E.
Transamerica Pyramid
The Transamerica Pyramid is an iconic, pyramid-shaped skyscraper in San Francisco and one of the city's most recognizable architectural landmarks.
- 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: Portland Expo Building Target entity description: The Portland Expo Building is a historic multi-purpose arena in Portland, Maine, best known today as the home court of the NBA G League’s Maine Celtics.
-
A.
Portland City Hall
Portland City Hall is the historic municipal building in downtown Portland, Oregon, that houses the offices and chambers of the city’s government.
-
B.
Smith Tower
Smith Tower is a historic early-20th-century skyscraper in downtown Seattle, once one of the tallest buildings in the United States and a prominent feature of the city's skyline.
-
C.
Palace of Fine Arts
The Palace of Fine Arts is a monumental Beaux-Arts structure in San Francisco originally built for the 1915 Panama–Pacific International Exposition and now a popular cultural and scenic landmark.
-
D.
Space Needle
The Space Needle is an iconic futuristic observation tower in Seattle, Washington, and a symbol of the city's skyline and the 1962 World's Fair.
-
E.
Transamerica Pyramid
The Transamerica Pyramid is an iconic, pyramid-shaped skyscraper in San Francisco and one of the city's most recognizable architectural landmarks.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
basketball team
ⓘ
historic building ⓘ indoor arena ⓘ multi-purpose arena ⓘ sports venue ⓘ |
| alsoKnownAs | The Expo ⓘ |
| architecturalStyle | early 20th-century arena architecture ⓘ |
| city | Portland ⓘ |
| continent | North America ⓘ |
| country | United States of America ⓘ |
| formerName |
Portland Exposition Building
ⓘ
linked to:
Portland Expo Building
|
| hasFunction |
event venue
ⓘ
exhibition hall ⓘ sports arena ⓘ |
| hasPublicTransit | Portland Metro bus service ⓘ |
| hasScoreboard | electronic scoreboard ⓘ |
| hasSurface | hardwood court ⓘ |
| hasTenant | Maine Celtics ⓘ |
| homeVenueOf | Maine Celtics ⓘ |
| indoorOutdoor | indoor venue ⓘ |
| league | NBA G League ⓘ |
| leagueLevelHosted | NBA G League ⓘ |
| locatedIn | Cumberland County, Maine ⓘ |
| location | Portland, Maine ⓘ |
| near | downtown Portland, Maine ⓘ |
| notableFor | being one of the oldest arenas in continuous use in professional basketball ⓘ |
| openingDate | 1915 ⓘ |
| operator |
City of Portland, Maine
ⓘ
linked to:
Portland, Maine, United States
|
| ownedBy |
City of Portland, Maine
ⓘ
linked to:
Portland, Maine
|
| partOf |
Portland Exposition complex
ⓘ
linked to:
Portland Expo Building
|
| primaryUse | basketball ⓘ |
| proximityTo | Hadlock Field ⓘ |
| region | New England ⓘ |
| roofType | enclosed ⓘ |
| significance | historic sports and events venue in Maine ⓘ |
| sport | basketball ⓘ |
| state | Maine ⓘ |
| usedAs | military facility during World War II ⓘ |
| usedDuring | World War II ⓘ |
| usedFor |
community events
ⓘ
concerts ⓘ conventions ⓘ sports events ⓘ trade shows ⓘ |
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: Portland Expo Building Description of subject: The Portland Expo Building is a historic multi-purpose arena in Portland, Maine, best known today as the home court of the NBA G League’s Maine Celtics.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Portland Expo Building
linked to: Portland Expo Building