Triple

T4215271
Position Surface form Disambiguated ID Type / Status
Subject Lake Toba E94199 entity
Predicate locatedIn P40 FINISHED
Object Toba Caldera
Toba Caldera is a massive volcanic supervolcano in northern Sumatra, Indonesia, known for one of the largest explosive eruptions in Earth’s history and now largely filled by Lake Toba.
 E425132 NE FINISHED

How this triple was built (4 steps)

Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.

NER Named-entity recognition gpt-5-mini
Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Toba Caldera | Statement: [Lake Toba, locatedIn, Toba Caldera]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Toba Caldera
Context triple: [Lake Toba, locatedIn, Toba Caldera]
  • A. Toba
    Toba is a coastal city in central Japan’s Mie Prefecture, known for its pearl cultivation, scenic bays, and maritime heritage.
  • B. Akan Caldera
    Akan Caldera is a large volcanic caldera in eastern Hokkaido, Japan, known for its scenic crater lakes, geothermal features, and active volcanic landscape.
  • C. Uzon caldera
    Uzon caldera is a large volcanic depression in Russia’s Kamchatka Peninsula, renowned for its active geothermal features, hot springs, and diverse volcanic landscapes within the Kamchatka volcanic arc.
  • D. Tao-Rusyr Caldera
    Tao-Rusyr Caldera is a large volcanic caldera and prominent geological feature located on Onekotan Island in Russia’s Kuril Island chain.
  • E. Tengger caldera
    Tengger caldera is a vast volcanic crater in East Java, Indonesia, famous for its dramatic landscape that includes the active Mount Bromo and attracts many tourists and photographers.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg Description generation gpt-5.1
Instruction
Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Toba Caldera
Triple: [Lake Toba, locatedIn, Toba Caldera]
Generated description
Toba Caldera is a massive volcanic supervolcano in northern Sumatra, Indonesia, known for one of the largest explosive eruptions in Earth’s history and now largely filled by Lake Toba.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Toba Caldera
Target entity description: Toba Caldera is a massive volcanic supervolcano in northern Sumatra, Indonesia, known for one of the largest explosive eruptions in Earth’s history and now largely filled by Lake Toba.
  • A. Toba
    Toba is a coastal city in central Japan’s Mie Prefecture, known for its pearl cultivation, scenic bays, and maritime heritage.
  • B. Akan Caldera
    Akan Caldera is a large volcanic caldera in eastern Hokkaido, Japan, known for its scenic crater lakes, geothermal features, and active volcanic landscape.
  • C. Uzon caldera
    Uzon caldera is a large volcanic depression in Russia’s Kamchatka Peninsula, renowned for its active geothermal features, hot springs, and diverse volcanic landscapes within the Kamchatka volcanic arc.
  • D. Tao-Rusyr Caldera
    Tao-Rusyr Caldera is a large volcanic caldera and prominent geological feature located on Onekotan Island in Russia’s Kuril Island chain.
  • E. Tengger caldera
    Tengger caldera is a vast volcanic crater in East Java, Indonesia, famous for its dramatic landscape that includes the active Mount Bromo and attracts many tourists and photographers.
  • F. None of above. chosen

Provenance (5 batches)

The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.

Step Stage Batch ID Status When
creating Elicitation batch_69b3451997e08190851db4a9a588837d completed March 12, 2026, 10:58 p.m.
NER Named-entity recognition batch_69b34be8ba408190baee362e5abbe75b completed March 12, 2026, 11:27 p.m.
NED1 Entity disambiguation (via context triple) batch_69b5a852e0448190bc488087e92a94d4 completed March 14, 2026, 6:26 p.m.
NEDg Description generation batch_69b5a8e024a081909e7ecbe969793281 completed March 14, 2026, 6:28 p.m.
NED2 Entity disambiguation (via description) batch_69b5acefd1f881908226ff68a741552b completed March 14, 2026, 6:46 p.m.
Created at: March 12, 2026, 11:04 p.m.