Triple

T5852594

Position	Surface form	Disambiguated ID	Type / Status
Subject	Sandown, New Hampshire	`E130070`	entity
Predicate	hasTransportationHistory	`P1298`	FINISHED
Object	Boston and Maine Railroad branch line The Boston and Maine Railroad branch line was a regional rail route in New England that once provided local passenger and freight service through towns such as Sandown, New Hampshire.	`E550164`	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: Boston and Maine Railroad branch line | Statement: [Sandown, New Hampshire, hasTransportationHistory, Boston and Maine Railroad branch line]

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

Target entity: Boston and Maine Railroad branch line
Context triple: [Sandown, New Hampshire, hasTransportationHistory, Boston and Maine Railroad branch line]

A. Boston and Maine Railroad Lexington Branch
The Boston and Maine Railroad Lexington Branch was a former suburban rail line in Massachusetts that once connected communities northwest of Boston and later provided the corridor for today’s Minuteman Bikeway.
B. Boston and Albany Railroad Highland branch
The Boston and Albany Railroad Highland branch was a former suburban rail line in the Boston area that later became the right-of-way for the MBTA Green Line D branch light rail service.
C. Fitchburg Line
The Fitchburg Line is a commuter rail service operated by the Massachusetts Bay Transportation Authority (MBTA) that runs between Boston and the city of Fitchburg in Massachusetts.
D. Boston–Maine rail network
The Boston–Maine rail network was a regional railroad system in New England that connected major cities and towns, notably linking Boston with communities throughout Maine and neighboring states.
E. Framingham/Worcester Line
The Framingham/Worcester Line is a Massachusetts Bay Transportation Authority commuter rail route connecting Boston with the western suburbs and the city of Worcester.
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: Boston and Maine Railroad branch line
Triple: [Sandown, New Hampshire, hasTransportationHistory, Boston and Maine Railroad branch line]

Generated description

The Boston and Maine Railroad branch line was a regional rail route in New England that once provided local passenger and freight service through towns such as Sandown, New Hampshire.

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

Target entity: Boston and Maine Railroad branch line
Target entity description: The Boston and Maine Railroad branch line was a regional rail route in New England that once provided local passenger and freight service through towns such as Sandown, New Hampshire.

A. Boston and Maine Railroad Lexington Branch
The Boston and Maine Railroad Lexington Branch was a former suburban rail line in Massachusetts that once connected communities northwest of Boston and later provided the corridor for today’s Minuteman Bikeway.
B. Boston and Albany Railroad Highland branch
The Boston and Albany Railroad Highland branch was a former suburban rail line in the Boston area that later became the right-of-way for the MBTA Green Line D branch light rail service.
C. Fitchburg Line
The Fitchburg Line is a commuter rail service operated by the Massachusetts Bay Transportation Authority (MBTA) that runs between Boston and the city of Fitchburg in Massachusetts.
D. Boston–Maine rail network
The Boston–Maine rail network was a regional railroad system in New England that connected major cities and towns, notably linking Boston with communities throughout Maine and neighboring states.
E. Framingham/Worcester Line
The Framingham/Worcester Line is a Massachusetts Bay Transportation Authority commuter rail route connecting Boston with the western suburbs and the city of Worcester.
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_69c0084de39081909eb34e6bed74215a`	completed	March 22, 2026, 3:18 p.m.
NER	Named-entity recognition	`batch_69c0355038008190bf38980349b533e2`	completed	March 22, 2026, 6:30 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69c0a1b8f8508190942ce1725884d254`	completed	March 23, 2026, 2:13 a.m.
NEDg	Description generation	`batch_69c0a30d66088190b6e37a95527b273d`	completed	March 23, 2026, 2:18 a.m.
NED2	Entity disambiguation (via description)	`batch_69c0a364931c81908d595d74cb4f9a7b`	completed	March 23, 2026, 2:20 a.m.

Created at: March 22, 2026, 3:55 p.m.