Triple

T4886097
Position Surface form Disambiguated ID Type / Status
Subject NGC 7538 E109441 entity
Predicate partOf P40 FINISHED
Object Cepheus OB2 association
The Cepheus OB2 association is a large, young stellar grouping in the constellation Cepheus, containing numerous massive O- and B-type stars and active star-forming regions.
 E492802 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: Cepheus OB2 association | Statement: [NGC 7538, partOf, Cepheus OB2 association]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Cepheus OB2 association
Context triple: [NGC 7538, partOf, Cepheus OB2 association]
  • A. Monoceros OB2 association
    Monoceros OB2 association is a large stellar grouping in the constellation Monoceros, notable for its young, massive stars and active star-forming regions such as the Rosette Nebula.
  • B. Perseus OB2 association
    Perseus OB2 association is a nearby group of young, massive OB-type stars located in the Perseus constellation region of the Milky Way.
  • C. Vela OB2 association
    Vela OB2 association is a nearby, young stellar grouping in the constellation Vela, rich in massive, hot stars and active star formation.
  • D. Cygnus OB2 association
    Cygnus OB2 association is a massive, young stellar grouping rich in hot, luminous O- and B-type stars located in the constellation Cygnus.
  • E. Scorpius–Centaurus OB association
    The Scorpius–Centaurus OB association is the nearest large group of young, massive stars to the Sun, spanning the constellations Scorpius and Centaurus and playing a key role in studies of recent star formation in our Galactic neighborhood.
  • 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: Cepheus OB2 association
Triple: [NGC 7538, partOf, Cepheus OB2 association]
Generated description
The Cepheus OB2 association is a large, young stellar grouping in the constellation Cepheus, containing numerous massive O- and B-type stars and active star-forming regions.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Cepheus OB2 association
Target entity description: The Cepheus OB2 association is a large, young stellar grouping in the constellation Cepheus, containing numerous massive O- and B-type stars and active star-forming regions.
  • A. Monoceros OB2 association
    Monoceros OB2 association is a large stellar grouping in the constellation Monoceros, notable for its young, massive stars and active star-forming regions such as the Rosette Nebula.
  • B. Perseus OB2 association
    Perseus OB2 association is a nearby group of young, massive OB-type stars located in the Perseus constellation region of the Milky Way.
  • C. Vela OB2 association
    Vela OB2 association is a nearby, young stellar grouping in the constellation Vela, rich in massive, hot stars and active star formation.
  • D. Cygnus OB2 association
    Cygnus OB2 association is a massive, young stellar grouping rich in hot, luminous O- and B-type stars located in the constellation Cygnus.
  • E. Scorpius–Centaurus OB association
    The Scorpius–Centaurus OB association is the nearest large group of young, massive stars to the Sun, spanning the constellations Scorpius and Centaurus and playing a key role in studies of recent star formation in our Galactic neighborhood.
  • 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_69bd440f71348190b99938e59fb7f9a1 completed March 20, 2026, 12:56 p.m.
NER Named-entity recognition batch_69bd6e01872c81909607010c10538ad1 completed March 20, 2026, 3:55 p.m.
NED1 Entity disambiguation (via context triple) batch_69beb0d3fef08190a45e68cab7bb5668 completed March 21, 2026, 2:53 p.m.
NEDg Description generation batch_69beb17a173c8190b8d7603c3defce7d completed March 21, 2026, 2:55 p.m.
NED2 Entity disambiguation (via description) batch_69beb206d1cc8190bb0be53494cc70ec completed March 21, 2026, 2:58 p.m.
Created at: March 20, 2026, 1:28 p.m.