Triple
T2980313
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Science Park station |
E80492
|
entity |
| Predicate | fareSystem |
P395
|
FINISHED |
| Object |
MBTA fare system
The MBTA fare system is the payment and ticketing framework used across Boston’s public transit network, including subways, buses, commuter rail, and ferries.
|
E127628
|
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 fare system | Statement: [Science Park station, fareSystem, MBTA fare system]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: MBTA fare system Context triple: [Science Park station, fareSystem, MBTA fare system]
-
A.
MBTA AFC 2.0
MBTA AFC 2.0 is the Massachusetts Bay Transportation Authority’s next-generation automated fare collection system designed to modernize how riders pay for and access public transit across Greater Boston.
-
B.
MBTA
The MBTA (Massachusetts Bay Transportation Authority) is the public transit agency that operates subway, bus, commuter rail, and ferry services in the Greater Boston area.
-
C.
MBTA
MBTA is a landmark U.S. federal law enacted in 1918 that protects migratory bird species by prohibiting their unauthorized capture, killing, or trade.
-
D.
MBTA fare gates
MBTA fare gates are automated entry barriers used in Boston’s public transit system that validate tickets and passes before allowing passengers to access trains and stations.
-
E.
MBTA CharlieTicket
MBTA CharlieTicket is a reusable paper fare card used for paying subway, bus, and commuter rail fares on the Massachusetts Bay Transportation Authority system.
- 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 fare system Triple: [Science Park station, fareSystem, MBTA fare system]
Generated description
The MBTA fare system is the payment and ticketing framework used across Boston’s public transit network, including subways, buses, commuter rail, and ferries.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: MBTA fare system Target entity description: The MBTA fare system is the payment and ticketing framework used across Boston’s public transit network, including subways, buses, commuter rail, and ferries.
-
A.
MBTA AFC 2.0
chosen
MBTA AFC 2.0 is the Massachusetts Bay Transportation Authority’s next-generation automated fare collection system designed to modernize how riders pay for and access public transit across Greater Boston.
-
B.
MBTA
The MBTA (Massachusetts Bay Transportation Authority) is the public transit agency that operates subway, bus, commuter rail, and ferry services in the Greater Boston area.
-
C.
MBTA
MBTA is a landmark U.S. federal law enacted in 1918 that protects migratory bird species by prohibiting their unauthorized capture, killing, or trade.
-
D.
MBTA fare gates
MBTA fare gates are automated entry barriers used in Boston’s public transit system that validate tickets and passes before allowing passengers to access trains and stations.
-
E.
MBTA CharlieTicket
MBTA CharlieTicket is a reusable paper fare card used for paying subway, bus, and commuter rail fares on the Massachusetts Bay Transportation Authority system.
- F. None of above.
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_69ad8b15f6ac8190be5fd16a33edcb4f |
completed | March 8, 2026, 2:43 p.m. |
| NER | Named-entity recognition | batch_69ad999e91788190a2d430dd0600a660 |
completed | March 8, 2026, 3:45 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69b108f27d648190a7a58670fec8b74d |
completed | March 11, 2026, 6:17 a.m. |
| NEDg | Description generation | batch_69b10bda5d848190af553c5f245b165d |
completed | March 11, 2026, 6:29 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69b10c9198288190a3e3ea7112ea4460 |
completed | March 11, 2026, 6:32 a.m. |
Created at: March 8, 2026, 2:58 p.m.