Triple
T8760855
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Leominster, Massachusetts |
E208192
|
entity |
| Predicate | hasRailService |
P782
|
FINISHED |
| Object |
MBTA Commuter Rail Fitchburg Line (nearby)
The MBTA Commuter Rail Fitchburg Line is a Massachusetts Bay Transportation Authority rail line that provides commuter service between Boston and communities to the northwest, including the Fitchburg area.
|
E754733
|
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: MBTA Commuter Rail Fitchburg Line (nearby) | Statement: [Leominster, Massachusetts, hasRailService, MBTA Commuter Rail Fitchburg Line (nearby)]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: MBTA Commuter Rail Fitchburg Line (nearby) Context triple: [Leominster, Massachusetts, hasRailService, MBTA Commuter Rail Fitchburg Line (nearby)]
-
A.
MBTA Commuter Rail Lowell Line
The MBTA Commuter Rail Lowell Line is a regional rail service in Greater Boston that connects Boston’s North Station with the city of Lowell and intermediate communities in northeastern Massachusetts.
-
B.
MBTA Commuter Rail Newburyport/Rockport Line
The MBTA Commuter Rail Newburyport/Rockport Line is a Massachusetts Bay Transportation Authority rail service running from Boston’s North Station through Boston’s North Shore communities to the coastal termini of Newburyport and Rockport.
-
C.
MBTA Commuter Rail Greenbush Line
The MBTA Commuter Rail Greenbush Line is a Massachusetts Bay Transportation Authority commuter rail route connecting Boston’s South Station with coastal South Shore communities, including towns such as Hingham, Cohasset, and Scituate.
-
D.
MBTA Commuter Rail Franklin Line
The MBTA Commuter Rail Franklin Line is a regional rail line in the Greater Boston area that provides passenger service between Boston and communities to the southwest, including Franklin.
-
E.
MBTA Commuter Rail Needham Line
The MBTA Commuter Rail Needham Line is a regional rail service in Greater Boston that connects downtown Boston with the suburb of Needham and intermediate communities.
- 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: MBTA Commuter Rail Fitchburg Line (nearby) Triple: [Leominster, Massachusetts, hasRailService, MBTA Commuter Rail Fitchburg Line (nearby)]
Generated description
The MBTA Commuter Rail Fitchburg Line is a Massachusetts Bay Transportation Authority rail line that provides commuter service between Boston and communities to the northwest, including the Fitchburg area.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: MBTA Commuter Rail Fitchburg Line (nearby) Target entity description: The MBTA Commuter Rail Fitchburg Line is a Massachusetts Bay Transportation Authority rail line that provides commuter service between Boston and communities to the northwest, including the Fitchburg area.
-
A.
MBTA Commuter Rail Lowell Line
The MBTA Commuter Rail Lowell Line is a regional rail service in Greater Boston that connects Boston’s North Station with the city of Lowell and intermediate communities in northeastern Massachusetts.
-
B.
MBTA Commuter Rail Newburyport/Rockport Line
The MBTA Commuter Rail Newburyport/Rockport Line is a Massachusetts Bay Transportation Authority rail service running from Boston’s North Station through Boston’s North Shore communities to the coastal termini of Newburyport and Rockport.
-
C.
MBTA Commuter Rail Greenbush Line
The MBTA Commuter Rail Greenbush Line is a Massachusetts Bay Transportation Authority commuter rail route connecting Boston’s South Station with coastal South Shore communities, including towns such as Hingham, Cohasset, and Scituate.
-
D.
MBTA Commuter Rail Franklin Line
The MBTA Commuter Rail Franklin Line is a regional rail line in the Greater Boston area that provides passenger service between Boston and communities to the southwest, including Franklin.
-
E.
MBTA Commuter Rail Needham Line
The MBTA Commuter Rail Needham Line is a regional rail service in Greater Boston that connects downtown Boston with the suburb of Needham and intermediate communities.
- 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_69ca835df7e08190ac875664cca8f9ca |
completed | March 30, 2026, 2:06 p.m. |
| NER | Named-entity recognition | batch_69cc5df9729481908679151988b76d2f |
completed | March 31, 2026, 11:51 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69cf434bcac08190be07175a26804185 |
completed | April 3, 2026, 4:34 a.m. |
| NEDg | Description generation | batch_69cf452b237c8190958f7b42e9611e7b |
completed | April 3, 2026, 4:42 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69cf45e6f4108190ac6955264b466abb |
completed | April 3, 2026, 4:45 a.m. |
Created at: March 30, 2026, 6:40 p.m.