Triple

T7535141

Position	Surface form	Disambiguated ID	Type / Status
Subject	Rockville station	`E178129`	entity
Predicate	locatedOnRailway	`P848`	FINISHED
Object	Metropolitan Subdivision (CSX Transportation) Metropolitan Subdivision (CSX Transportation) is a major CSX freight and passenger rail line in Maryland that forms part of the former Baltimore & Ohio Railroad main line between Washington, D.C., and points northwest.	`E670973`	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: Metropolitan Subdivision (CSX Transportation) | Statement: [Rockville station, locatedOnRailway, Metropolitan Subdivision (CSX Transportation)]

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

Target entity: Metropolitan Subdivision (CSX Transportation)
Context triple: [Rockville station, locatedOnRailway, Metropolitan Subdivision (CSX Transportation)]

A. CSX Capital Subdivision
CSX Capital Subdivision is a CSX Transportation rail line in Maryland that serves as a key freight and commuter corridor between Washington, D.C., and Baltimore.
B. CSX Bellwood Subdivision
The CSX Bellwood Subdivision is a freight rail line in Virginia operated by CSX Transportation, forming part of the company’s network around the Richmond area.
C. CSX Old Main Line Subdivision
The CSX Old Main Line Subdivision is a historic freight rail line in Maryland that traces much of the original route of the Baltimore and Ohio Railroad, one of the oldest railroads in the United States.
D. CSX RF&P Subdivision
The CSX RF&P Subdivision is a major CSX Transportation rail line in Virginia that forms part of the busy freight and passenger corridor linking Washington, D.C. with Richmond and points south.
E. CSX Transportation Cumberland Subdivision
CSX Transportation's Cumberland Subdivision is a major freight rail line running through Maryland and West Virginia that also hosts MARC commuter rail service on the Brunswick Line.
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: Metropolitan Subdivision (CSX Transportation)
Triple: [Rockville station, locatedOnRailway, Metropolitan Subdivision (CSX Transportation)]

Generated description

Metropolitan Subdivision (CSX Transportation) is a major CSX freight and passenger rail line in Maryland that forms part of the former Baltimore & Ohio Railroad main line between Washington, D.C., and points northwest.

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

Target entity: Metropolitan Subdivision (CSX Transportation)
Target entity description: Metropolitan Subdivision (CSX Transportation) is a major CSX freight and passenger rail line in Maryland that forms part of the former Baltimore & Ohio Railroad main line between Washington, D.C., and points northwest.

A. CSX Capital Subdivision
CSX Capital Subdivision is a CSX Transportation rail line in Maryland that serves as a key freight and commuter corridor between Washington, D.C., and Baltimore.
B. CSX Bellwood Subdivision
The CSX Bellwood Subdivision is a freight rail line in Virginia operated by CSX Transportation, forming part of the company’s network around the Richmond area.
C. CSX Old Main Line Subdivision
The CSX Old Main Line Subdivision is a historic freight rail line in Maryland that traces much of the original route of the Baltimore and Ohio Railroad, one of the oldest railroads in the United States.
D. CSX RF&P Subdivision
The CSX RF&P Subdivision is a major CSX Transportation rail line in Virginia that forms part of the busy freight and passenger corridor linking Washington, D.C. with Richmond and points south.
E. CSX Transportation Cumberland Subdivision
CSX Transportation's Cumberland Subdivision is a major freight rail line running through Maryland and West Virginia that also hosts MARC commuter rail service on the Brunswick Line.
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_69c69f2acdbc8190b5a8320168c1d0ba`	completed	March 27, 2026, 3:15 p.m.
NER	Named-entity recognition	`batch_69c6f84c13208190971096a0b81b0ff2`	completed	March 27, 2026, 9:36 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69c84f0c02148190bb5f63cf9891ec0c`	completed	March 28, 2026, 9:58 p.m.
NEDg	Description generation	`batch_69c84f9ce82081908813a1185b9b3570`	completed	March 28, 2026, 10:01 p.m.
NED2	Entity disambiguation (via description)	`batch_69c8500e64788190b196988290aea7d7`	completed	March 28, 2026, 10:02 p.m.

Created at: March 27, 2026, 3:47 p.m.