Triple
T820971
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | MBTA Commuter Rail Newburyport/Rockport Line |
E17744
|
entity |
| Predicate | usesInfrastructure |
P6820
|
FINISHED |
| Object |
Newburyport Branch
The Newburyport Branch is a rail line segment in northeastern Massachusetts that forms part of the MBTA Commuter Rail’s Newburyport/Rockport Line, connecting communities north of Boston.
|
E98145
|
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: Newburyport Branch | Statement: [MBTA Commuter Rail Newburyport/Rockport Line, usesInfrastructure, Newburyport Branch]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Newburyport Branch Context triple: [MBTA Commuter Rail Newburyport/Rockport Line, usesInfrastructure, Newburyport Branch]
-
A.
MBTA Braintree Branch
The MBTA Braintree Branch is a southern extension of Boston’s Red Line rapid transit system that runs from JFK/UMass through several South Shore communities to Braintree.
-
B.
Ashmont branch
The Ashmont branch is a southern segment of Boston's MBTA Red Line rapid transit system that serves neighborhoods including Dorchester and terminates at Ashmont station.
-
C.
Swampscott
Swampscott is a coastal town in northeastern Massachusetts known for its residential character and seaside location north of Boston.
-
D.
Medford Public Library
Medford Public Library is the main public library serving the residents of Medford, Massachusetts with lending materials, community programs, and educational resources.
-
E.
Malden Center station
Malden Center station is a major transit hub in Malden, Massachusetts, serving both MBTA Orange Line subway and commuter rail services.
- 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: Newburyport Branch Triple: [MBTA Commuter Rail Newburyport/Rockport Line, usesInfrastructure, Newburyport Branch]
Generated description
The Newburyport Branch is a rail line segment in northeastern Massachusetts that forms part of the MBTA Commuter Rail’s Newburyport/Rockport Line, connecting communities north of Boston.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Newburyport Branch Target entity description: The Newburyport Branch is a rail line segment in northeastern Massachusetts that forms part of the MBTA Commuter Rail’s Newburyport/Rockport Line, connecting communities north of Boston.
-
A.
MBTA Braintree Branch
The MBTA Braintree Branch is a southern extension of Boston’s Red Line rapid transit system that runs from JFK/UMass through several South Shore communities to Braintree.
-
B.
Ashmont branch
The Ashmont branch is a southern segment of Boston's MBTA Red Line rapid transit system that serves neighborhoods including Dorchester and terminates at Ashmont station.
-
C.
Swampscott
Swampscott is a coastal town in northeastern Massachusetts known for its residential character and seaside location north of Boston.
-
D.
Medford Public Library
Medford Public Library is the main public library serving the residents of Medford, Massachusetts with lending materials, community programs, and educational resources.
-
E.
Malden Center station
Malden Center station is a major transit hub in Malden, Massachusetts, serving both MBTA Orange Line subway and commuter rail services.
- 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_69a4937bcaac8190a322524ac6f45a5a |
completed | March 1, 2026, 7:28 p.m. |
| NER | Named-entity recognition | batch_69a4ab7aea38819092a0860ec6e2a033 |
completed | March 1, 2026, 9:11 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a76d91c2948190bc13a223548facba |
completed | March 3, 2026, 11:24 p.m. |
| NEDg | Description generation | batch_69a77e828bb08190a67768d08557f305 |
completed | March 4, 2026, 12:36 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69a77efbc2ac819083a900d2ecd8924e |
completed | March 4, 2026, 12:38 a.m. |
Created at: March 1, 2026, 7:38 p.m.