Spring Point Ledge
E682055
Spring Point Ledge is a rocky underwater hazard in Portland Harbor, Maine, marked for navigation safety by the nearby Spring Point Ledge Light.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Spring Point Ledge canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7683728 — 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: Spring Point Ledge Context triple: [Spring Point Ledge Light, locatedOn, Spring Point Ledge]
-
A.
Cathedral Ledge
Cathedral Ledge is a prominent granite cliff and popular rock-climbing and sightseeing destination in New Hampshire’s White Mountains.
-
B.
Pautuck Hill
Pautuck Hill is a small, coastal hill located in Barnstable County on Cape Cod, Massachusetts.
-
C.
Holy Cross Ridge
Holy Cross Ridge is a high mountain summit in the Sawatch Range of the Rocky Mountains in Colorado, known as a subsidiary peak near the famous Mount of the Holy Cross.
-
D.
South Ledge
South Ledge is a small, rocky maritime feature in the Singapore Strait that has been the subject of a territorial dispute between Singapore and Malaysia.
-
E.
Edson’s Ridge
Edson’s Ridge is a strategically important ridgeline on Guadalcanal in the Solomon Islands, best known as the site of a pivotal World War II battle between U.S. Marines and Japanese forces in 1942.
- 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: Spring Point Ledge Target entity description: Spring Point Ledge is a rocky underwater hazard in Portland Harbor, Maine, marked for navigation safety by the nearby Spring Point Ledge Light.
-
A.
Cathedral Ledge
Cathedral Ledge is a prominent granite cliff and popular rock-climbing and sightseeing destination in New Hampshire’s White Mountains.
-
B.
Pautuck Hill
Pautuck Hill is a small, coastal hill located in Barnstable County on Cape Cod, Massachusetts.
-
C.
Holy Cross Ridge
Holy Cross Ridge is a high mountain summit in the Sawatch Range of the Rocky Mountains in Colorado, known as a subsidiary peak near the famous Mount of the Holy Cross.
-
D.
South Ledge
South Ledge is a small, rocky maritime feature in the Singapore Strait that has been the subject of a territorial dispute between Singapore and Malaysia.
-
E.
Edson’s Ridge
Edson’s Ridge is a strategically important ridgeline on Guadalcanal in the Solomon Islands, best known as the site of a pivotal World War II battle between U.S. Marines and Japanese forces in 1942.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
navigation hazard
ⓘ
submerged rock formation ⓘ underwater hazard ⓘ |
| associatedWith |
Port of Portland
ⓘ
linked to:
Port of Portland (Maine)
shipping traffic in Casco Bay ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| hasCharacteristic |
exposed at low tide
ⓘ
rocky ⓘ submerged ⓘ |
| hasFunction | poses danger to navigation ⓘ |
| hazardType | submerged ledge ⓘ |
| locatedIn |
Cumberland County, Maine
ⓘ
Maine ⓘ Portland Harbor ⓘ South Portland, Maine ⓘ United States ⓘ
linked to:
United States of America
|
| locatedInBodyOfWater | Casco Bay ⓘ |
| markedBy | Spring Point Ledge Light ⓘ |
| navigationalStatus | charted hazard ⓘ |
| nearbyStructure | Spring Point Ledge Light ⓘ |
| partOf | approaches to Portland Harbor ⓘ |
| proximityTo |
Fort Preble
ⓘ
Southern Maine Community College waterfront ⓘ
linked to:
Southern Maine Community College
|
| safetyMeasure | marked by lighthouse ⓘ |
| usedFor | reference point for marine navigation ⓘ |
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: Spring Point Ledge Description of subject: Spring Point Ledge is a rocky underwater hazard in Portland Harbor, Maine, marked for navigation safety by the nearby Spring Point Ledge Light.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.