Stefanos crater
E1004653
Stefanos crater is the main hydrothermal explosion crater on the Greek volcanic island of Nisyros, known for its active fumaroles and sulfurous, moonlike landscape.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Stefanos crater canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T12805130 — 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: Stefanos crater Context triple: [Nisyros volcano, hasCrater, Stefanos crater]
-
A.
Agnano crater
Agnano crater is a volcanic crater located within the Phlegraean Fields near Naples, Italy, known for its geothermal activity and association with the region’s complex caldera system.
-
B.
Dolomieu Crater
Dolomieu Crater is the main summit caldera of the active Piton de la Fournaise volcano on Réunion Island, known for its frequent eruptions and dramatic collapses.
-
C.
Nobile crater
Nobile crater is a prominent impact feature near the Moon’s south pole, notable for its permanently shadowed regions that may harbor water ice.
-
D.
Kameni Chora lava dome
Kameni Chora lava dome is a volcanic lava dome on the Methana Peninsula in Greece, formed by viscous lava that solidified near its vent.
-
E.
Empakaai Crater
Empakaai Crater is a scenic volcanic caldera in northern Tanzania renowned for its deep soda lake, steep forested walls, and abundant birdlife within the Ngorongoro ecosystem.
- 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: Stefanos crater Target entity description: Stefanos crater is the main hydrothermal explosion crater on the Greek volcanic island of Nisyros, known for its active fumaroles and sulfurous, moonlike landscape.
-
A.
Agnano crater
Agnano crater is a volcanic crater located within the Phlegraean Fields near Naples, Italy, known for its geothermal activity and association with the region’s complex caldera system.
-
B.
Dolomieu Crater
Dolomieu Crater is the main summit caldera of the active Piton de la Fournaise volcano on Réunion Island, known for its frequent eruptions and dramatic collapses.
-
C.
Nobile crater
Nobile crater is a prominent impact feature near the Moon’s south pole, notable for its permanently shadowed regions that may harbor water ice.
-
D.
Kameni Chora lava dome
Kameni Chora lava dome is a volcanic lava dome on the Methana Peninsula in Greece, formed by viscous lava that solidified near its vent.
-
E.
Empakaai Crater
Empakaai Crater is a scenic volcanic caldera in northern Tanzania renowned for its deep soda lake, steep forested walls, and abundant birdlife within the Ngorongoro ecosystem.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
hydrothermal explosion crater
ⓘ
volcanic crater ⓘ |
| accessibleFrom |
village of Mandraki
ⓘ
village of Nikia ⓘ |
| country | Greece ⓘ |
| depth | approximately 25–30 meters ⓘ |
| diameter | approximately 300 meters ⓘ |
| elevation | approximately 100 meters above sea level ⓘ |
| emitsGas |
carbon dioxide
ⓘ
hydrogen sulfide ⓘ sulfur dioxide ⓘ |
| formedBy |
hydrothermal explosion
ⓘ
phreatic activity ⓘ |
| geologicalAge | Holocene ⓘ |
| hasActivity |
emission of steam
ⓘ
emission of volcanic gases ⓘ |
| hasFeature |
active fumaroles
ⓘ
boiling mud pools ⓘ fumarolic field ⓘ hydrothermal alteration zones ⓘ hydrothermal vents ⓘ moonlike landscape ⓘ steep crater walls ⓘ sulfur deposits ⓘ sulfurous smell ⓘ yellow sulfur crusts ⓘ |
| hasRisk |
high ground temperatures
ⓘ
possible future hydrothermal explosions ⓘ toxic gas accumulation ⓘ |
| hasTypeOfActivity |
fumarolic
ⓘ
hydrothermal ⓘ |
| inSea | Aegean Sea ⓘ |
| isMainCraterOf | Nisyros hydrothermal field ⓘ |
| isTouristAttraction | true ⓘ |
| locatedIn |
Dodecanese
ⓘ
Greece ⓘ Nisyros ⓘ South Aegean ⓘ |
| near |
Lofos dome
ⓘ
Polyvotis crater ⓘ |
| onIsland | Nisyros ⓘ |
| partOf |
Hellenic volcanic arc
ⓘ
Nisyros volcanic complex ⓘ
linked to:
Nisyros volcano
|
| surfaceColor |
brown
ⓘ
orange ⓘ white ⓘ yellow ⓘ |
| usedFor |
geothermal research
ⓘ
volcanological studies ⓘ |
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: Stefanos crater Description of subject: Stefanos crater is the main hydrothermal explosion crater on the Greek volcanic island of Nisyros, known for its active fumaroles and sulfurous, moonlike landscape.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.