Penobscot River
E95230
The Penobscot River is a major river in Maine that flows through central and eastern parts of the state to Penobscot Bay, historically important for transportation, logging, and fisheries.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Penobscot River canonical | 53 |
| West Branch Penobscot River | 4 |
| Penobscot River watershed | 3 |
| East Branch Penobscot River | 2 |
| East Branch of the Penobscot River | 1 |
| Penobscot River (vicinity) | 1 |
| Penobscot River valley | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T356951 — 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: Penobscot River Context triple: [Bangor metropolitan area, locatedOnRiver, Penobscot River]
-
A.
Kennebec River
The Kennebec River is a major river in central Maine known for its historical role in logging and shipping and its popular whitewater rafting and recreational opportunities.
-
B.
Androscoggin River
The Androscoggin River is a major river in northern New England that flows from New Hampshire through western Maine, historically important for logging, hydropower, and recreation.
-
C.
Piscataqua River
The Piscataqua River is a tidal estuary forming part of the border between New Hampshire and Maine in the northeastern United States, known for its strong currents and historic role in regional trade and shipbuilding.
-
D.
Winnipesaukee River
The Winnipesaukee River is a New Hampshire river that drains Lake Winnipesaukee and flows southward through several towns before joining other waterways to help form the Merrimack River.
-
E.
Quinnipiac River
The Quinnipiac River is a river in south-central Connecticut that flows south through several communities before emptying into Long Island Sound.
- 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: Penobscot River Target entity description: The Penobscot River is a major river in Maine that flows through central and eastern parts of the state to Penobscot Bay, historically important for transportation, logging, and fisheries.
-
A.
Kennebec River
The Kennebec River is a major river in central Maine known for its historical role in logging and shipping and its popular whitewater rafting and recreational opportunities.
-
B.
Androscoggin River
The Androscoggin River is a major river in northern New England that flows from New Hampshire through western Maine, historically important for logging, hydropower, and recreation.
-
C.
Piscataqua River
The Piscataqua River is a tidal estuary forming part of the border between New Hampshire and Maine in the northeastern United States, known for its strong currents and historic role in regional trade and shipbuilding.
-
D.
Winnipesaukee River
The Winnipesaukee River is a New Hampshire river that drains Lake Winnipesaukee and flows southward through several towns before joining other waterways to help form the Merrimack River.
-
E.
Quinnipiac River
The Quinnipiac River is a river in south-central Connecticut that flows south through several communities before emptying into Long Island Sound.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
geographical feature
ⓘ
river ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| country |
United States of America
ⓘ
surface form:
United States
|
| emptiesInto | Penobscot Bay ⓘ |
| flowsNear |
Bangor, Maine
ⓘ
Howland, Maine ⓘ Lincoln, Maine ⓘ Millinocket, Maine ⓘ Old Town, Maine ⓘ |
| flowsThrough |
central Maine
ⓘ
eastern Maine ⓘ |
| hasCulturalSignificanceFor |
Penobscot people
ⓘ
surface form:
Penobscot Nation
|
| hasEconomicImportance |
commercial fishing
ⓘ
hydropower ⓘ recreation ⓘ |
| hasEcosystemType | estuarine system at its mouth ⓘ |
| hasWildlife |
American shad
ⓘ
Atlantic salmon ⓘ alewife ⓘ bald eagle ⓘ striped bass ⓘ |
| historicalUse |
fisheries
ⓘ
logging ⓘ transportation ⓘ |
| locatedIn | Maine ⓘ |
| locatedInCounty |
Hancock County
ⓘ
Penobscot County, Maine ⓘ
surface form:
Penobscot County
Piscataquis County, Maine ⓘ
surface form:
Piscataquis County
Waldo County, Maine ⓘ
surface form:
Waldo County
|
| locatedInRegion | New England ⓘ |
| mouthLocation |
Gulf of Maine
ⓘ
Penobscot Bay ⓘ |
| namedAfter | Penobscot people ⓘ |
| partOf | Penobscot River watershed ⓘ |
| region |
Downeast Maine
ⓘ
surface form:
Downeast Maine vicinity
central Maine forest region ⓘ |
| tributary |
Penobscot River
self-linksurface differs
ⓘ
surface form:
East Branch Penobscot River
Kenduskeag Stream ⓘ Mattawamkeag River ⓘ Piscataquis River ⓘ Souadabscook Stream ⓘ Penobscot River self-linksurface differs ⓘ
surface form:
West Branch Penobscot River
|
| usedFor |
boating
ⓘ
sport fishing ⓘ timber transport (historically) ⓘ |
| wasSiteOf | Penobscot River Restoration Project ⓘ |
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: Penobscot River Description of subject: The Penobscot River is a major river in Maine that flows through central and eastern parts of the state to Penobscot Bay, historically important for transportation, logging, and fisheries.
Referenced by (65)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Eastern Maine
this entity surface form:
Penobscot River valley
this entity surface form:
Penobscot River (vicinity)
this entity surface form:
Penobscot River watershed
this entity surface form:
East Branch of the Penobscot River
this entity surface form:
East Branch Penobscot River
this entity surface form:
West Branch Penobscot River
this entity surface form:
Penobscot River watershed
this entity surface form:
West Branch Penobscot River
this entity surface form:
Penobscot River watershed
this entity surface form:
West Branch Penobscot River
this entity surface form:
West Branch Penobscot River
this entity surface form:
East Branch Penobscot River
subject surface form:
Brewer family