Triple

T29565505

Position	Surface form	Disambiguated ID	Type / Status
Subject	Brauer–Manin obstruction	`E753151`	entity
Predicate	canBeNontrivialFor	`P192430`	FINISHED
Object	Châtelet surfaces Châtelet surfaces are a class of rational algebraic surfaces over number fields that serve as key examples in arithmetic geometry, particularly for illustrating failures of the Hasse principle and weak approximation.	`E1875388`	NE FINISHED

How this triple was built (2 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: Châtelet surfaces | Statement: [Brauer–Manin obstruction, canBeNontrivialFor, Châtelet surfaces]

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: Châtelet surfaces
Triple: [Brauer–Manin obstruction, canBeNontrivialFor, Châtelet surfaces]

Generated description

Châtelet surfaces are a class of rational algebraic surfaces over number fields that serve as key examples in arithmetic geometry, particularly for illustrating failures of the Hasse principle and weak approximation.

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_69f0ef7fcb4881908a933110adb9bda1`	completed	April 28, 2026, 5:33 p.m.
NER	Named-entity recognition	`batch_69fd0c44b1188190b282731bdab4d301`	completed	May 7, 2026, 10:03 p.m.
NED1	Entity disambiguation (via context triple)	`batch_6a262d68eff88190bbdbcb569e590116`	completed	June 8, 2026, 2:48 a.m.
NEDg	Description generation	`batch_6a26317def3881908eb2e11b7754e1ac`	completed	June 8, 2026, 3:05 a.m.
NED2	Entity disambiguation (via description)	`batch_6a2635ad095481909c2fbed70b7a5f4c`	completed	June 8, 2026, 3:23 a.m.

Created at: April 28, 2026, 5:52 p.m.