Triple

T16294229

Position	Surface form	Disambiguated ID	Type / Status
Subject	Polly Ann Trail	`E395605`	entity
Predicate	formerRailroad	`P30332`	FINISHED
Object	Pontiac, Oxford and Northern Railroad The Pontiac, Oxford and Northern Railroad was a regional rail line in Michigan that once served communities between Pontiac and the northern parts of Oakland County, later abandoned and converted in part into the Polly Ann Trail.	`E1205732`	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: Pontiac, Oxford and Northern Railroad | Statement: [Polly Ann Trail, formerRailroad, Pontiac, Oxford and Northern Railroad]

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

Target entity: Pontiac, Oxford and Northern Railroad
Context triple: [Polly Ann Trail, formerRailroad, Pontiac, Oxford and Northern Railroad]

A. Northern Central Railway
Northern Central Railway was a historic American railroad that operated primarily in Pennsylvania and Maryland, serving as an important north–south link in the 19th and early 20th centuries.
B. Piedmont and Northern Railway
The Piedmont and Northern Railway was an early 20th-century electric interurban and freight railroad that operated in the Carolinas and later became part of larger southeastern U.S. rail systems.
C. Baltimore and Susquehanna Railroad
The Baltimore and Susquehanna Railroad was an early 19th-century American railroad that helped pioneer rail transportation in Maryland and Pennsylvania, eventually becoming part of the Northern Central Railway system.
D. Chesterfield Railroad
The Chesterfield Railroad was one of the earliest commercial railroads in the United States, built in the 1830s to transport coal from the mines around present-day Midlothian, Virginia, to the James River.
E. Canton Railroad Company
Canton Railroad Company is a shortline freight railroad serving industrial customers in and around the Port of Baltimore.
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: Pontiac, Oxford and Northern Railroad
Triple: [Polly Ann Trail, formerRailroad, Pontiac, Oxford and Northern Railroad]

Generated description

The Pontiac, Oxford and Northern Railroad was a regional rail line in Michigan that once served communities between Pontiac and the northern parts of Oakland County, later abandoned and converted in part into the Polly Ann Trail.

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

Target entity: Pontiac, Oxford and Northern Railroad
Target entity description: The Pontiac, Oxford and Northern Railroad was a regional rail line in Michigan that once served communities between Pontiac and the northern parts of Oakland County, later abandoned and converted in part into the Polly Ann Trail.

A. Northern Central Railway
Northern Central Railway was a historic American railroad that operated primarily in Pennsylvania and Maryland, serving as an important north–south link in the 19th and early 20th centuries.
B. Piedmont and Northern Railway
The Piedmont and Northern Railway was an early 20th-century electric interurban and freight railroad that operated in the Carolinas and later became part of larger southeastern U.S. rail systems.
C. Baltimore and Susquehanna Railroad
The Baltimore and Susquehanna Railroad was an early 19th-century American railroad that helped pioneer rail transportation in Maryland and Pennsylvania, eventually becoming part of the Northern Central Railway system.
D. Chesterfield Railroad
The Chesterfield Railroad was one of the earliest commercial railroads in the United States, built in the 1830s to transport coal from the mines around present-day Midlothian, Virginia, to the James River.
E. Canton Railroad Company
Canton Railroad Company is a shortline freight railroad serving industrial customers in and around the Port of Baltimore.
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_69d87f22c7248190a54c949738441e2e`	completed	April 10, 2026, 4:40 a.m.
NER	Named-entity recognition	`batch_69e25e2c255881909d99c43770475329`	completed	April 17, 2026, 4:22 p.m.
NED1	Entity disambiguation (via context triple)	`batch_6a001f9965b8819080278ccef15288aa`	completed	May 10, 2026, 6:03 a.m.
NEDg	Description generation	`batch_6a0021459c4081908e4c1d2e0bc8a5be`	completed	May 10, 2026, 6:10 a.m.
NED2	Entity disambiguation (via description)	`batch_6a0022247e908190842ca6186b4e9c4c`	completed	May 10, 2026, 6:13 a.m.

Created at: April 10, 2026, 5:05 a.m.