Ol Doinyo Lengai
E221588
Ol Doinyo Lengai is an active stratovolcano in northern Tanzania renowned as the world’s only known volcano that erupts natrocarbonatite lava.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Ol Doinyo Lengai canonical | 5 |
| Ol Doinyo Lengai volcano | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T1740125 — 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: Ol Doinyo Lengai Context triple: [East African Rift, contains, Ol Doinyo Lengai]
-
A.
Mount Kelimutu
Mount Kelimutu is a volcano on the Indonesian island of Flores famous for its three strikingly colored crater lakes that periodically change hues due to volcanic activity and mineral content.
-
B.
Ekarma Volcano
Ekarma Volcano is an active stratovolcano forming the uninhabited island of Ekarma in the central Kuril Islands chain of the northwest Pacific.
-
C.
Mount Erebus
Mount Erebus is an active stratovolcano on Ross Island in Antarctica, known for being the southernmost active volcano on Earth and for its persistent lava lake.
-
D.
Erta Ale
Erta Ale is an active basaltic shield volcano in Ethiopia, famous for its long-lived lava lake and location in the geologically extreme Danakil Depression.
-
E.
Volcán Wolf
Volcán Wolf is a large shield volcano on Isabela Island in the Galápagos, known for its remote location, frequent eruptions, and unique surrounding wildlife.
- 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: Ol Doinyo Lengai Target entity description: Ol Doinyo Lengai is an active stratovolcano in northern Tanzania renowned as the world’s only known volcano that erupts natrocarbonatite lava.
-
A.
Mount Kelimutu
Mount Kelimutu is a volcano on the Indonesian island of Flores famous for its three strikingly colored crater lakes that periodically change hues due to volcanic activity and mineral content.
-
B.
Ekarma Volcano
Ekarma Volcano is an active stratovolcano forming the uninhabited island of Ekarma in the central Kuril Islands chain of the northwest Pacific.
-
C.
Mount Erebus
Mount Erebus is an active stratovolcano on Ross Island in Antarctica, known for being the southernmost active volcano on Earth and for its persistent lava lake.
-
D.
Erta Ale
Erta Ale is an active basaltic shield volcano in Ethiopia, famous for its long-lived lava lake and location in the geologically extreme Danakil Depression.
-
E.
Volcán Wolf
Volcán Wolf is a large shield volcano on Isabela Island in the Galápagos, known for its remote location, frequent eruptions, and unique surrounding wildlife.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
active volcano
ⓘ
natrocarbonatite volcano ⓘ stratovolcano ⓘ |
| age | Quaternary volcano ⓘ |
| belongsTo | East African Volcanic Province ⓘ |
| closestLargeCity |
Arusha
ⓘ
linked to:
Arusha, Tanzania
|
| country | Tanzania ⓘ |
| culturalSignificance | sacred mountain for Maasai people ⓘ |
| elevation |
approximately 2960 m
ⓘ
approximately 9711 ft ⓘ |
| eruptionHistory | frequent small eruptions in 20th and 21st centuries ⓘ |
| eruptionStyle |
effusive
ⓘ
explosive ⓘ |
| erupts |
carbonatite lava
ⓘ
natrocarbonatite lava ⓘ |
| geologicalSetting | rift-related volcano ⓘ |
| hasCrater | summit crater with active vents ⓘ |
| hasUniqueFeature | only known volcano currently erupting natrocarbonatite magma ⓘ |
| hazardType |
lahars
ⓘ
lava flows ⓘ volcanic ash ⓘ |
| lastMajorEruption | 2007–2008 ⓘ |
| lavaColor |
dark brown to black when molten
ⓘ
light gray to white when cooled ⓘ |
| lavaComposition |
low silica content
ⓘ
potassium carbonate ⓘ sodium carbonate ⓘ |
| lavaTemperature | approximately 500–600 °C ⓘ |
| locatedIn |
Arusha Region
ⓘ
East African Rift ⓘ Gregory Rift ⓘ Northern Tanzania ⓘ
linked to:
northern Tanzania
|
| locatedNear |
Lake Natron
ⓘ
Ngorongoro Conservation Area ⓘ |
| monitoredBy |
Tanzanian geological authorities
ⓘ
global volcano monitoring networks ⓘ |
| nameLanguage | Maasai language ⓘ |
| nameMeaning | Mountain of God ⓘ |
| nearbyEthnicGroup | Maasai ⓘ |
| nearbySettlement | Engare Sero ⓘ |
| notableFor | world’s only known active natrocarbonatite lava eruptions ⓘ |
| partOf |
East African Rift System
ⓘ
linked to:
East African Rift
|
| surfaceFeatures | hornitos and small cones in summit crater ⓘ |
| tectonicPlate | African Plate ⓘ |
| tourism | popular destination for trekking ⓘ |
| volcanoNumber | 222120 (Global Volcanism Program) ⓘ |
| volcanoType | stratovolcano ⓘ |
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: Ol Doinyo Lengai Description of subject: Ol Doinyo Lengai is an active stratovolcano in northern Tanzania renowned as the world’s only known volcano that erupts natrocarbonatite lava.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Ol Doinyo Lengai
linked to: Ol Doinyo Lengai