Triple

T21770865
Position Surface form Disambiguated ID Type / Status
Subject Old Main Line Trail E537421 entity
Predicate follows P134 FINISHED
Object Old Main Line of the Baltimore and Ohio Railroad
The Old Main Line of the Baltimore and Ohio Railroad is one of the earliest railroad routes in the United States, historically linking Baltimore with the interior and pioneering American rail transportation.
E1501408 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 Main Line of the Baltimore and Ohio Railroad | Statement: [Old Main Line Trail, follows, Old Main Line of the Baltimore and Ohio Railroad]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Old Main Line of the Baltimore and Ohio Railroad
Context triple: [Old Main Line Trail, follows, Old Main Line of the Baltimore and Ohio Railroad]
  • A. Old Main Line
    Old Main Line is a historic section of the Birmingham Canal Navigations in England, forming part of the early industrial-era canal network around Birmingham.
  • B. South Side Railroad
    South Side Railroad was a key 19th-century rail line in Virginia that linked the strategic transportation hub of Petersburg with Richmond and other points west, playing an important role in regional commerce and Civil War logistics.
  • C. former Georgetown Branch of the Baltimore and Ohio Railroad
    The former Georgetown Branch of the Baltimore and Ohio Railroad was a freight rail line in the Washington, D.C. area that once connected the main B&O network to Georgetown along the Potomac River.
  • D. Perkiomen Railroad
    Perkiomen Railroad was a historic rail line in southeastern Pennsylvania that later became the basis for the modern Perkiomen Trail.
  • E. Washington–Baltimore rail corridor
    The Washington–Baltimore rail corridor is a heavily traveled rail route linking the U.S. capital with Baltimore, used by both passenger and freight services and forming a key segment of the Northeast transportation network.
  • 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 Main Line of the Baltimore and Ohio Railroad
Triple: [Old Main Line Trail, follows, Old Main Line of the Baltimore and Ohio Railroad]
Generated description
The Old Main Line of the Baltimore and Ohio Railroad is one of the earliest railroad routes in the United States, historically linking Baltimore with the interior and pioneering American rail transportation.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Old Main Line of the Baltimore and Ohio Railroad
Target entity description: The Old Main Line of the Baltimore and Ohio Railroad is one of the earliest railroad routes in the United States, historically linking Baltimore with the interior and pioneering American rail transportation.
  • A. Old Main Line
    Old Main Line is a historic section of the Birmingham Canal Navigations in England, forming part of the early industrial-era canal network around Birmingham.
  • B. South Side Railroad
    South Side Railroad was a key 19th-century rail line in Virginia that linked the strategic transportation hub of Petersburg with Richmond and other points west, playing an important role in regional commerce and Civil War logistics.
  • C. former Georgetown Branch of the Baltimore and Ohio Railroad
    The former Georgetown Branch of the Baltimore and Ohio Railroad was a freight rail line in the Washington, D.C. area that once connected the main B&O network to Georgetown along the Potomac River.
  • D. Perkiomen Railroad
    Perkiomen Railroad was a historic rail line in southeastern Pennsylvania that later became the basis for the modern Perkiomen Trail.
  • E. Washington–Baltimore rail corridor
    The Washington–Baltimore rail corridor is a heavily traveled rail route linking the U.S. capital with Baltimore, used by both passenger and freight services and forming a key segment of the Northeast transportation network.
  • 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_69e0c46f5d1c8190bf830409e98464e5 completed April 16, 2026, 11:13 a.m.
NER Named-entity recognition batch_69f031aea8c88190b4bc57df6f269ba6 completed April 28, 2026, 4:03 a.m.
NED1 Entity disambiguation (via context triple) batch_6a0a367bbd008190b374213331527287 completed May 17, 2026, 9:43 p.m.
NEDg Description generation batch_6a0a373aca708190aae867f78c87b956 completed May 17, 2026, 9:46 p.m.
NED2 Entity disambiguation (via description) batch_6a0a37e0bed48190b0319d62eaff5d1e completed May 17, 2026, 9:49 p.m.
Created at: April 16, 2026, 6:51 p.m.