Triple

T276470

Position	Surface form	Disambiguated ID	Type / Status
Subject	Fields Corner	`E5259`	entity
Predicate	hasFormerService	`P3388`	FINISHED
Object	Old Colony Railroad (nearby historical service) Old Colony Railroad (nearby historical service) was a historic New England rail line that once operated passenger and freight trains through the Dorchester area of Boston, including the vicinity of Fields Corner.	`E36018`	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: Old Colony Railroad (nearby historical service) | Statement: [Fields Corner, hasFormerService, Old Colony Railroad (nearby historical service)]

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

Target entity: Old Colony Railroad (nearby historical service)
Context triple: [Fields Corner, hasFormerService, Old Colony Railroad (nearby historical service)]

A. Fitchburg Railroad
The Fitchburg Railroad was a historic New England rail line that operated across Massachusetts and into Vermont, later becoming part of the Boston and Maine Railroad system.
B. Boston and Maine Railroad
The Boston and Maine Railroad was a major New England railroad that operated extensive passenger and freight services across Massachusetts, New Hampshire, Maine, and surrounding states from the 19th through the mid-20th century.
C. Florida East Coast Railway (historical)
The Florida East Coast Railway (historical) was a major rail line developed by Henry Flagler that opened up Florida’s Atlantic coast to tourism, commerce, and urban growth in the late 19th and early 20th centuries.
D. MBTA Commuter Rail network
The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
E. MBTA Fitchburg Line
The MBTA Fitchburg Line is a commuter rail route in the Greater Boston area that runs between Boston and Fitchburg, serving numerous suburban communities along the way.
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: Old Colony Railroad (nearby historical service)
Triple: [Fields Corner, hasFormerService, Old Colony Railroad (nearby historical service)]

Generated description

Old Colony Railroad (nearby historical service) was a historic New England rail line that once operated passenger and freight trains through the Dorchester area of Boston, including the vicinity of Fields Corner.

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

Target entity: Old Colony Railroad (nearby historical service)
Target entity description: Old Colony Railroad (nearby historical service) was a historic New England rail line that once operated passenger and freight trains through the Dorchester area of Boston, including the vicinity of Fields Corner.

A. Fitchburg Railroad
The Fitchburg Railroad was a historic New England rail line that operated across Massachusetts and into Vermont, later becoming part of the Boston and Maine Railroad system.
B. Boston and Maine Railroad
The Boston and Maine Railroad was a major New England railroad that operated extensive passenger and freight services across Massachusetts, New Hampshire, Maine, and surrounding states from the 19th through the mid-20th century.
C. Florida East Coast Railway (historical)
The Florida East Coast Railway (historical) was a major rail line developed by Henry Flagler that opened up Florida’s Atlantic coast to tourism, commerce, and urban growth in the late 19th and early 20th centuries.
D. MBTA Commuter Rail network
The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
E. MBTA Fitchburg Line
The MBTA Fitchburg Line is a commuter rail route in the Greater Boston area that runs between Boston and Fitchburg, serving numerous suburban communities along the way.
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_69a257e6c8788190987dfe705ca2912a`	completed	Feb. 28, 2026, 2:50 a.m.
NER	Named-entity recognition	`batch_69a25dec53ac8190912f3d79576131fa`	completed	Feb. 28, 2026, 3:15 a.m.
NED1	Entity disambiguation (via context triple)	`batch_69a391525a7081909166884a8ea47ace`	completed	March 1, 2026, 1:07 a.m.
NEDg	Description generation	`batch_69a391e734148190a56e6a07447af304`	completed	March 1, 2026, 1:09 a.m.
NED2	Entity disambiguation (via description)	`batch_69a3924ca2148190811f9d376805d0cd`	completed	March 1, 2026, 1:11 a.m.

Created at: Feb. 28, 2026, 2:59 a.m.