Triple

T12253177

Position	Surface form	Disambiguated ID	Type / Status
Subject	Farmington Canal Heritage Trail	`E292026`	entity
Predicate	followsRouteOf	`P2127`	FINISHED
Object	New Haven–Northampton Railroad The New Haven–Northampton Railroad was a historic New England rail line that once connected New Haven, Connecticut to Northampton, Massachusetts and later became the corridor for today’s Farmington Canal Heritage Trail.	`E972579`	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: New Haven–Northampton Railroad | Statement: [Farmington Canal Heritage Trail, followsRouteOf, New Haven–Northampton Railroad]

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

Target entity: New Haven–Northampton Railroad
Context triple: [Farmington Canal Heritage Trail, followsRouteOf, New Haven–Northampton Railroad]

A. Hartford and New Haven Railroad
The Hartford and New Haven Railroad was a 19th-century rail line in Connecticut that later became part of the larger New York, New Haven and Hartford Railroad system.
B. New Haven–Springfield Line
The New Haven–Springfield Line is a key passenger rail corridor in the northeastern United States connecting New Haven, Connecticut, with Springfield, Massachusetts, and serving both intercity and commuter rail services.
C. New England Central Railroad
New England Central Railroad is a regional freight railroad operating primarily in New England, providing vital rail connections between local industries and the broader North American rail network.
D. New Canaan Railroad
The New Canaan Railroad was a 19th-century railroad company in Connecticut that built and operated the line later known as Metro-North's New Canaan Branch.
E. Central New England Railway
The Central New England Railway was a regional railroad that operated in the northeastern United States, primarily serving communities in New York and New England during the late 19th and early 20th centuries.
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: New Haven–Northampton Railroad
Triple: [Farmington Canal Heritage Trail, followsRouteOf, New Haven–Northampton Railroad]

Generated description

The New Haven–Northampton Railroad was a historic New England rail line that once connected New Haven, Connecticut to Northampton, Massachusetts and later became the corridor for today’s Farmington Canal Heritage Trail.

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

Target entity: New Haven–Northampton Railroad
Target entity description: The New Haven–Northampton Railroad was a historic New England rail line that once connected New Haven, Connecticut to Northampton, Massachusetts and later became the corridor for today’s Farmington Canal Heritage Trail.

A. Hartford and New Haven Railroad
The Hartford and New Haven Railroad was a 19th-century rail line in Connecticut that later became part of the larger New York, New Haven and Hartford Railroad system.
B. New Haven–Springfield Line
The New Haven–Springfield Line is a key passenger rail corridor in the northeastern United States connecting New Haven, Connecticut, with Springfield, Massachusetts, and serving both intercity and commuter rail services.
C. New England Central Railroad
New England Central Railroad is a regional freight railroad operating primarily in New England, providing vital rail connections between local industries and the broader North American rail network.
D. New Canaan Railroad
The New Canaan Railroad was a 19th-century railroad company in Connecticut that built and operated the line later known as Metro-North's New Canaan Branch.
E. Central New England Railway
The Central New England Railway was a regional railroad that operated in the northeastern United States, primarily serving communities in New York and New England during the late 19th and early 20th centuries.
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_69d6ab67950c8190be08450a06228c4b`	completed	April 8, 2026, 7:24 p.m.
NER	Named-entity recognition	`batch_69d91cc849308190b6ff416f8b4f01e8`	completed	April 10, 2026, 3:52 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69f60abdc5988190a19104385f54fb06`	completed	May 2, 2026, 2:31 p.m.
NEDg	Description generation	`batch_69f60d8456d881908b5647b77fc53780`	completed	May 2, 2026, 2:43 p.m.
NED2	Entity disambiguation (via description)	`batch_69f60e2c52b0819094c8e67286235400`	completed	May 2, 2026, 2:46 p.m.

Created at: April 8, 2026, 9:52 p.m.