Mount Lassen
E864977
Mount Lassen, officially Lassen Peak, is an active volcanic peak in Northern California’s Cascade Range known for its dramatic 1914–1921 eruptions and its status as a centerpiece of Lassen Volcanic National Park.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mount Lassen canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10438635 — 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: Mount Lassen Context triple: [Snow Mountain, hasAlternativeName, Mount Lassen]
-
A.
Mount Mazama
Mount Mazama is an ancient stratovolcano in southern Oregon whose massive eruption about 7,700 years ago created the caldera now filled by Crater Lake.
-
B.
Burnt Peak
Burnt Peak is a prominent mountain summit in northern Los Angeles County, California, known as the highest point in the Sierra Pelona range and a notable local hiking and lookout destination.
-
C.
Mount Shasta volcanic complex
The Mount Shasta volcanic complex is a large, active stratovolcano system in Northern California that includes multiple overlapping volcanic cones and domes, prominently featuring Mount Shasta and its satellite cone Shastina.
-
D.
Mount St. Helena
Mount St. Helena is a prominent volcanic peak in California’s Coast Ranges, known for its hiking trails, panoramic views, and role as a landmark at the northern end of Napa Valley.
-
E.
Mount Shasta
Mount Shasta is a prominent, snow-capped stratovolcano in the Cascade Range renowned for its striking prominence, outdoor recreation, and spiritual significance.
- 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: Mount Lassen Target entity description: Mount Lassen, officially Lassen Peak, is an active volcanic peak in Northern California’s Cascade Range known for its dramatic 1914–1921 eruptions and its status as a centerpiece of Lassen Volcanic National Park.
-
A.
Mount Mazama
Mount Mazama is an ancient stratovolcano in southern Oregon whose massive eruption about 7,700 years ago created the caldera now filled by Crater Lake.
-
B.
Burnt Peak
Burnt Peak is a prominent mountain summit in northern Los Angeles County, California, known as the highest point in the Sierra Pelona range and a notable local hiking and lookout destination.
-
C.
Mount Shasta volcanic complex
The Mount Shasta volcanic complex is a large, active stratovolcano system in Northern California that includes multiple overlapping volcanic cones and domes, prominently featuring Mount Shasta and its satellite cone Shastina.
-
D.
Mount St. Helena
Mount St. Helena is a prominent volcanic peak in California’s Coast Ranges, known for its hiking trails, panoramic views, and role as a landmark at the northern end of Napa Valley.
-
E.
Mount Shasta
Mount Shasta is a prominent, snow-capped stratovolcano in the Cascade Range renowned for its striking prominence, outdoor recreation, and spiritual significance.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
active volcano
ⓘ
mountain ⓘ stratovolcano ⓘ |
| accessedBy | Lassen Peak Trail NERFINISHED ⓘ |
| age | Pleistocene ⓘ |
| alsoKnownAs | Mount Lassen NERFINISHED ⓘ |
| climateZone | alpine ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| elevation |
10457 feet
ⓘ
3187 meters ⓘ |
| eruptionStyle |
explosive eruptions
ⓘ
lava dome growth ⓘ |
| formedBy | extrusion of viscous lava ⓘ |
| geologicalSetting | subduction zone volcano ⓘ |
| hasFeature |
glacially carved slopes
ⓘ
radial lava domes nearby ⓘ summit crater remnants ⓘ |
| hazardPotential | future explosive eruptions ⓘ |
| lastEruptionEnd | 1921 ⓘ |
| lastEruptionStart | 1914 ⓘ |
| locatedIn |
Lassen Volcanic National Park
NERFINISHED
ⓘ
Northern California ⓘ Shasta County, California NERFINISHED ⓘ Tehama County, California NERFINISHED ⓘ |
| majorEruptionYear | 1915 ⓘ |
| managedBy | United States National Park Service NERFINISHED ⓘ |
| monitoredBy |
USGS California Volcano Observatory
NERFINISHED
ⓘ
United States Geological Survey NERFINISHED ⓘ |
| mountainRange | Cascade Range ⓘ |
| nearbyCity |
Red Bluff, California
NERFINISHED
ⓘ
Redding, California NERFINISHED ⓘ |
| notableFor |
1914–1921 eruption sequence
ⓘ
being one of the few volcanoes in the contiguous United States to erupt in the 20th century ⓘ being one of the largest plug dome volcanoes in the world ⓘ |
| parkEstablishmentYear | 1916 ⓘ |
| partOf |
Cascade Range volcanoes
NERFINISHED
ⓘ
Lassen Volcanic Center NERFINISHED ⓘ |
| prominence |
2013 meters
ⓘ
6604 feet ⓘ |
| protectedArea | Lassen Volcanic National Park NERFINISHED ⓘ |
| region | Pacific Northwest volcanic province NERFINISHED ⓘ |
| relativeLocation | southernmost major volcano of the Cascade Range ⓘ |
| rockType | dacite ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| volcanicArcBelt | Cascade Volcanic Arc NERFINISHED ⓘ |
| volcanoType | plug dome volcano ⓘ |
| within |
Lassen National Forest (partly surrounding park)
NERFINISHED
ⓘ
Lassen Volcanic National Park Wilderness (part) NERFINISHED ⓘ |
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: Mount Lassen Description of subject: Mount Lassen, officially Lassen Peak, is an active volcanic peak in Northern California’s Cascade Range known for its dramatic 1914–1921 eruptions and its status as a centerpiece of Lassen Volcanic National Park.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Snow Mountain