MBTA Commuter Rail Zone 1A
E170289
MBTA Commuter Rail Zone 1A is the innermost fare zone of the Boston-area commuter rail system, covering central city stations with the lowest commuter rail fares.
All labels observed (4)
| Label | Occurrences |
|---|---|
| MBTA Commuter Rail Zone 1A canonical | 4 |
| MBTA fare zone 1A | 2 |
| MBTA Zone 1A | 1 |
| MBTA rapid transit zone | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1057808 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: MBTA Commuter Rail Zone 1A Context triple: [Porter (MBTA station), hasZone, MBTA Commuter Rail Zone 1A]
-
A.
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.
-
B.
MBTA Ashmont Branch
The MBTA Ashmont Branch is a rapid transit line of Boston’s Red Line that runs from JFK/UMass station through Dorchester to Ashmont, serving several southern neighborhoods of the city.
-
C.
MBTA Commuter Rail Kingston Line
The MBTA Commuter Rail Kingston Line is a Massachusetts Bay Transportation Authority rail line providing commuter service between Boston and the South Shore, terminating in Kingston, Massachusetts.
-
D.
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.
-
E.
MBTA Silver Line
The MBTA Silver Line is a bus rapid transit service in Boston that operates in dedicated lanes and tunnels, linking key neighborhoods, Logan Airport, and South Station.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: MBTA Commuter Rail Zone 1A Target entity description: MBTA Commuter Rail Zone 1A is the innermost fare zone of the Boston-area commuter rail system, covering central city stations with the lowest commuter rail fares.
-
A.
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.
-
B.
MBTA Ashmont Branch
The MBTA Ashmont Branch is a rapid transit line of Boston’s Red Line that runs from JFK/UMass station through Dorchester to Ashmont, serving several southern neighborhoods of the city.
-
C.
MBTA Commuter Rail Kingston Line
The MBTA Commuter Rail Kingston Line is a Massachusetts Bay Transportation Authority rail line providing commuter service between Boston and the South Shore, terminating in Kingston, Massachusetts.
-
D.
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.
-
E.
MBTA Silver Line
The MBTA Silver Line is a bus rapid transit service in Boston that operates in dedicated lanes and tunnels, linking key neighborhoods, Logan Airport, and South Station.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
MBTA fare product
ⓘ
fare zone ⓘ |
| appliesTo |
inbound trips to central Boston within Zone 1A
ⓘ
outbound trips originating in Zone 1A to Zone 1A stations ⓘ short-distance commuter rail trips within central Boston ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| covers | central Boston commuter rail stations ⓘ |
| currency |
USD
ⓘ
linked to:
US dollar
|
| fareCalculationBasis | origin–destination zone system ⓘ |
| fareCategory |
7-day pass
ⓘ
monthly pass ⓘ reduced fare ⓘ regular adult fare ⓘ weekend pass ⓘ |
| fareCollectionMethod |
gated entry at some stations
ⓘ
proof-of-payment on trains ⓘ |
| fareIntegration | aligned with MBTA subway fare level ⓘ |
| fareLevel | lowest MBTA commuter rail fare zone ⓘ |
| fareMediaAccepted |
CharlieCard
ⓘ
CharlieTicket ⓘ mTicket mobile app ⓘ |
| farePolicy | flat fare within Zone 1A ⓘ |
| farePolicyType | distance-based zonal pricing ⓘ |
| fareStructureRole | innermost commuter rail fare zone ⓘ |
| fareZoneOrder | inner zone before Zone 1 ⓘ |
| fareZoneSystem | MBTA Commuter Rail zone-based fares ⓘ |
| governingBody | MBTA Fiscal and Management Control Board ⓘ |
| hasAdvantage | cheaper than Zone 1 and outer zones ⓘ |
| hasDiscounts | reduced fare for eligible riders ⓘ |
| introducedBy |
Massachusetts Bay Transportation Authority
ⓘ
linked to:
MBTA
|
| isDefinedBy | MBTA fare tariff documents ⓘ |
| isPartOf |
MBTA regional transit network
ⓘ
linked to:
MBTA Commuter Rail network
|
| locatedIn |
Boston metropolitan area
ⓘ
linked to:
Greater Boston
|
| mode | rail ⓘ |
| operator |
Massachusetts Bay Transportation Authority
ⓘ
linked to:
MBTA
|
| partOf |
MBTA Commuter Rail
ⓘ
linked to:
MBTA Commuter Rail network
|
| primaryPurpose | provide low-cost commuter rail access to central Boston ⓘ |
| regionServed | Greater Boston ⓘ |
| serviceAreaCharacteristic | dense urban core ⓘ |
| serviceType | commuter rail ⓘ |
| targetUsers |
commuters to downtown Boston
ⓘ
occasional riders within central Boston ⓘ |
| usedFor |
commuter rail passes
ⓘ
commuter rail single-ride fares ⓘ |
| zoneNumber | 1A ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: MBTA Commuter Rail Zone 1A Description of subject: MBTA Commuter Rail Zone 1A is the innermost fare zone of the Boston-area commuter rail system, covering central city stations with the lowest commuter rail fares.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: MBTA Commuter Rail Zone 1A
linked to: MBTA Commuter Rail Zone 1A
linked to: MBTA Commuter Rail Zone 1A
subject linked to:
Forest Hills MBTA station
linked to: MBTA Commuter Rail Zone 1A