Triple

T9627754

Position	Surface form	Disambiguated ID	Type / Status
Subject	Event Horizon Telescope	`E232512`	entity
Predicate	hasMemberInstitution	`P1933`	FINISHED
Object	MIT Haystack Observatory MIT Haystack Observatory is a radio science and astronomy research center of the Massachusetts Institute of Technology known for its contributions to very long baseline interferometry and projects like the Event Horizon Telescope.	`E809922`	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: MIT Haystack Observatory | Statement: [Event Horizon Telescope, hasMemberInstitution, MIT Haystack Observatory]

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: MIT Haystack Observatory
Context triple: [Event Horizon Telescope, hasMemberInstitution, MIT Haystack Observatory]

A. Harvard College Observatory
Harvard College Observatory is a historic astronomical research institution affiliated with Harvard University, renowned for its pioneering work in observational astronomy and astrophysics.
B. Smithsonian Astrophysical Observatory
The Smithsonian Astrophysical Observatory is a major research institution dedicated to the study of astronomy and astrophysics, known for its work in observational astronomy, space science, and collaboration with the Harvard College Observatory.
C. Fred Lawrence Whipple Observatory
The Fred Lawrence Whipple Observatory is a major astronomical research facility in Arizona known for its optical and gamma-ray telescopes used to study the universe.
D. Lowell Observatory
Lowell Observatory is a historic astronomical research institution in Flagstaff, Arizona, renowned for its role in major discoveries including the identification of Pluto.
E. Hat Creek Radio Observatory
Hat Creek Radio Observatory is a radio astronomy facility in Northern California known for hosting the Allen Telescope Array used in both astronomical and SETI research.
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: MIT Haystack Observatory
Triple: [Event Horizon Telescope, hasMemberInstitution, MIT Haystack Observatory]

Generated description

MIT Haystack Observatory is a radio science and astronomy research center of the Massachusetts Institute of Technology known for its contributions to very long baseline interferometry and projects like the Event Horizon Telescope.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: MIT Haystack Observatory
Target entity description: MIT Haystack Observatory is a radio science and astronomy research center of the Massachusetts Institute of Technology known for its contributions to very long baseline interferometry and projects like the Event Horizon Telescope.

A. Harvard College Observatory
Harvard College Observatory is a historic astronomical research institution affiliated with Harvard University, renowned for its pioneering work in observational astronomy and astrophysics.
B. Smithsonian Astrophysical Observatory
The Smithsonian Astrophysical Observatory is a major research institution dedicated to the study of astronomy and astrophysics, known for its work in observational astronomy, space science, and collaboration with the Harvard College Observatory.
C. Fred Lawrence Whipple Observatory
The Fred Lawrence Whipple Observatory is a major astronomical research facility in Arizona known for its optical and gamma-ray telescopes used to study the universe.
D. Lowell Observatory
Lowell Observatory is a historic astronomical research institution in Flagstaff, Arizona, renowned for its role in major discoveries including the identification of Pluto.
E. Hat Creek Radio Observatory
Hat Creek Radio Observatory is a radio astronomy facility in Northern California known for hosting the Allen Telescope Array used in both astronomical and SETI research.
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_69ca848793ec8190a93a12383a754dc0`	completed	March 30, 2026, 2:11 p.m.
NER	Named-entity recognition	`batch_69cd9afeb64c8190be91024c2e9039d3`	completed	April 1, 2026, 10:23 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69d1798129dc819090a29efcbcf34b8e`	completed	April 4, 2026, 8:50 p.m.
NEDg	Description generation	`batch_69d17a48fa188190af50e4a1b9f1653b`	completed	April 4, 2026, 8:53 p.m.
NED2	Entity disambiguation (via description)	`batch_69d17ac217188190921d08f8aa7ca833`	completed	April 4, 2026, 8:55 p.m.

Created at: March 30, 2026, 8:10 p.m.