Triple
T21577969
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Transportation in Middlesex County, Massachusetts |
E532448
|
entity |
| Predicate | lightRailLine |
P17788
|
FINISHED |
| Object | Green Line Extension |
—
|
NE NERFINISHED |
How this triple was built (2 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: Green Line Extension | Statement: [Transportation in Middlesex County, Massachusetts, lightRailLine, Green Line Extension]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Green Line Extension Context triple: [Transportation in Middlesex County, Massachusetts, lightRailLine, Green Line Extension]
-
A.
Green Line Extension
chosen
The Green Line Extension is a Massachusetts Bay Transportation Authority light rail project that extends Boston’s Green Line service into previously unserved neighborhoods in Somerville and Medford.
-
B.
Green Line southern extension
The Green Line southern extension is a Washington Metro expansion project that extended the Green Line further into the suburbs of Prince George's County, Maryland, adding several new stations beyond its previous terminus.
-
C.
Red Line Valley extension
Red Line Valley extension is the segment of Los Angeles Metro’s Red Line subway that was built to extend service into the San Fernando Valley, terminating in North Hollywood.
-
D.
Red Line Northwest Extension corridor
The Red Line Northwest Extension corridor is a planned expansion route of Boston's MBTA Red Line intended to extend rapid transit service northwest from its current terminus.
-
E.
North Line extension of Red Line
The North Line extension of the Red Line is a METRORail light rail expansion in Houston that extends service north from downtown to additional neighborhoods and transit connections.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Provenance (2 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_69e0c4618bec8190bcb0feb74568cbb1 |
completed | April 16, 2026, 11:13 a.m. |
| NER | Named-entity recognition | batch_69eeeb59cee08190aae55ad6e2a4e077 |
completed | April 27, 2026, 4:51 a.m. |
Created at: April 16, 2026, 6:31 p.m.