Triple

T20576738
Position Surface form Disambiguated ID Type / Status
Subject Pierre Méchain E505236 entity
Predicate discovered P412 FINISHED
Object Messier 91
Messier 91 is a barred spiral galaxy in the constellation Coma Berenices, notable as one of the fainter members of the Virgo Cluster.
 E1449048 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: Messier 91 | Statement: [Pierre Méchain, discovered, Messier 91]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Messier 91
Context triple: [Pierre Méchain, discovered, Messier 91]
  • A. Messier 110
    Messier 110 is a dwarf elliptical satellite galaxy of the Andromeda Galaxy located in the Local Group.
  • B. Messier 85
    Messier 85 is a lenticular or elliptical galaxy in the Virgo Cluster, located in the constellation Coma Berenices and observed as a bright, nearly featureless system of older stars.
  • C. Messier 65
    Messier 65 is a bright spiral galaxy in the constellation Leo, notable as one of the three galaxies forming the Leo Triplet.
  • D. Messier 51
    Messier 51, also known as the Whirlpool Galaxy, is a famous face-on spiral galaxy in the constellation Canes Venatici noted for its striking structure and interaction with a companion galaxy.
  • E. Messier 66
    Messier 66 is a bright, barred spiral galaxy in the constellation Leo and a prominent member of the Leo Triplet galaxy group.
  • 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: Messier 91
Triple: [Pierre Méchain, discovered, Messier 91]
Generated description
Messier 91 is a barred spiral galaxy in the constellation Coma Berenices, notable as one of the fainter members of the Virgo Cluster.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Messier 91
Target entity description: Messier 91 is a barred spiral galaxy in the constellation Coma Berenices, notable as one of the fainter members of the Virgo Cluster.
  • A. Messier 110
    Messier 110 is a dwarf elliptical satellite galaxy of the Andromeda Galaxy located in the Local Group.
  • B. Messier 85
    Messier 85 is a lenticular or elliptical galaxy in the Virgo Cluster, located in the constellation Coma Berenices and observed as a bright, nearly featureless system of older stars.
  • C. Messier 65
    Messier 65 is a bright spiral galaxy in the constellation Leo, notable as one of the three galaxies forming the Leo Triplet.
  • D. Messier 51
    Messier 51, also known as the Whirlpool Galaxy, is a famous face-on spiral galaxy in the constellation Canes Venatici noted for its striking structure and interaction with a companion galaxy.
  • E. Messier 66
    Messier 66 is a bright, barred spiral galaxy in the constellation Leo and a prominent member of the Leo Triplet galaxy group.
  • 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_69e0b4b721588190993ac7b0a9be2736 completed April 16, 2026, 10:06 a.m.
NER Named-entity recognition batch_69e6a90af3608190955d2c7950726178 completed April 20, 2026, 10:30 p.m.
NED1 Entity disambiguation (via context triple) batch_6a08e8262e988190a50fb3bc137669a6 completed May 16, 2026, 9:56 p.m.
NEDg Description generation batch_6a08e93ff7dc8190b4668b965e90ab10 completed May 16, 2026, 10:01 p.m.
NED2 Entity disambiguation (via description) batch_6a08ea02a1688190bc7944f67067bcfa completed May 16, 2026, 10:04 p.m.
Created at: April 16, 2026, 11:39 a.m.