Triple

T18305509

Position	Surface form	Disambiguated ID	Type / Status
Subject	Rockville Bridge	`E438471`	entity
Predicate	hasCategory	`P87`	FINISHED
Object	Pennsylvania Railroad bridges Pennsylvania Railroad bridges are a group of historically significant railroad bridges in the United States that were designed, built, or operated by the former Pennsylvania Railroad, often noted for their large scale and engineering innovation.	`E1316312`	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: Pennsylvania Railroad bridges | Statement: [Rockville Bridge, hasCategory, Pennsylvania Railroad bridges]

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

Target entity: Pennsylvania Railroad bridges
Context triple: [Rockville Bridge, hasCategory, Pennsylvania Railroad bridges]

A. Lehigh Valley Railroad Bridge (former)
The Lehigh Valley Railroad Bridge (former) was a now-demolished rail bridge that once carried Lehigh Valley Railroad trains across Newark Bay in New Jersey.
B. Delaware River bridge system
The Delaware River bridge system is a network of major highway and commuter bridges that span the Delaware River, connecting New Jersey, Pennsylvania, and Delaware to support regional transportation and commerce.
C. Bollman Truss Railroad Bridge
The Bollman Truss Railroad Bridge is a historic 19th-century iron railroad bridge in Savage, Maryland, notable as one of the earliest surviving examples of a cast- and wrought-iron truss bridge in the United States.
D. Starrucca Viaduct, Pennsylvania
Starrucca Viaduct in Pennsylvania is a historic 19th-century stone railroad bridge renowned for its impressive series of arches and its prominence in American landscape art.
E. CSX Railroad Bridge
The CSX Railroad Bridge is a freight rail bridge in Washington, D.C., carrying CSX Transportation trains across the Anacostia River as part of a major East Coast rail corridor.
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: Pennsylvania Railroad bridges
Triple: [Rockville Bridge, hasCategory, Pennsylvania Railroad bridges]

Generated description

Pennsylvania Railroad bridges are a group of historically significant railroad bridges in the United States that were designed, built, or operated by the former Pennsylvania Railroad, often noted for their large scale and engineering innovation.

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

Target entity: Pennsylvania Railroad bridges
Target entity description: Pennsylvania Railroad bridges are a group of historically significant railroad bridges in the United States that were designed, built, or operated by the former Pennsylvania Railroad, often noted for their large scale and engineering innovation.

A. Lehigh Valley Railroad Bridge (former)
The Lehigh Valley Railroad Bridge (former) was a now-demolished rail bridge that once carried Lehigh Valley Railroad trains across Newark Bay in New Jersey.
B. Delaware River bridge system
The Delaware River bridge system is a network of major highway and commuter bridges that span the Delaware River, connecting New Jersey, Pennsylvania, and Delaware to support regional transportation and commerce.
C. Bollman Truss Railroad Bridge
The Bollman Truss Railroad Bridge is a historic 19th-century iron railroad bridge in Savage, Maryland, notable as one of the earliest surviving examples of a cast- and wrought-iron truss bridge in the United States.
D. Starrucca Viaduct, Pennsylvania
Starrucca Viaduct in Pennsylvania is a historic 19th-century stone railroad bridge renowned for its impressive series of arches and its prominence in American landscape art.
E. CSX Railroad Bridge
The CSX Railroad Bridge is a freight rail bridge in Washington, D.C., carrying CSX Transportation trains across the Anacostia River as part of a major East Coast rail corridor.
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_69d8b915e3e881909125d760c15d0c29`	completed	April 10, 2026, 8:47 a.m.
NER	Named-entity recognition	`batch_69e50183394081909b86cefaaa0a3aa8`	completed	April 19, 2026, 4:23 p.m.
NED1	Entity disambiguation (via context triple)	`batch_6a03bb61ec0c81908764d5a907d17ffe`	completed	May 12, 2026, 11:44 p.m.
NEDg	Description generation	`batch_6a03bbda80748190b8e56fb77140ecb9`	completed	May 12, 2026, 11:46 p.m.
NED2	Entity disambiguation (via description)	`batch_6a03bc589a548190b6226a104adea97e`	completed	May 12, 2026, 11:48 p.m.

Created at: April 10, 2026, 10:35 a.m.