MBTA CharlieCard
E36017
The MBTA CharlieCard is a reusable contactless smart card used to pay fares on Boston’s public transit system, including subways, buses, and some commuter rail and ferry services.
All labels observed (4)
| Label | Occurrences |
|---|---|
| MBTA CharlieCard canonical | 19 |
| Disability CharlieCard | 1 |
| MBTA CharlieCard system | 1 |
| MBTA fare media | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T276454 — 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 CharlieCard Context triple: [Fields Corner, fareSystem, MBTA CharlieCard]
-
A.
SmarTrip
SmarTrip is a rechargeable contactless smart card used to pay fares on the Washington, D.C. region’s public transit systems.
-
B.
MetroCard
MetroCard is a magnetic stripe payment card formerly used as the primary method for paying fares on New York City’s public transit system, including subways and buses.
-
C.
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.
-
D.
MetroAccess
MetroAccess is a paratransit service providing door-to-door transportation for people with disabilities in the Washington, D.C. metropolitan area.
-
E.
SEPTA Key
SEPTA Key is a contactless smart fare card and payment system used across Philadelphia’s SEPTA public transit network.
- 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 CharlieCard Target entity description: The MBTA CharlieCard is a reusable contactless smart card used to pay fares on Boston’s public transit system, including subways, buses, and some commuter rail and ferry services.
-
A.
SmarTrip
SmarTrip is a rechargeable contactless smart card used to pay fares on the Washington, D.C. region’s public transit systems.
-
B.
MetroCard
MetroCard is a magnetic stripe payment card formerly used as the primary method for paying fares on New York City’s public transit system, including subways and buses.
-
C.
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.
-
D.
MetroAccess
MetroAccess is a paratransit service providing door-to-door transportation for people with disabilities in the Washington, D.C. metropolitan area.
-
E.
SEPTA Key
SEPTA Key is a contactless smart fare card and payment system used across Philadelphia’s SEPTA public transit network.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
contactless smart card
ⓘ
fare payment card ⓘ |
| allows |
contactless fare payment at fare gates
ⓘ
contactless fare payment on bus fareboxes ⓘ |
| category |
Fare collection systems
ⓘ
Smart cards in the United States ⓘ Transport in Boston ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| currency | US dollar ⓘ |
| fareSystem | MBTA fare system ⓘ |
| hasNameOrigin |
Charlie on the MTA song
ⓘ
linked to:
song "Charlie on the MTA"
|
| hasVariant |
Disability CharlieCard
ⓘ
linked to:
MBTA CharlieCard
Employee CharlieCard ⓘ Senior CharlieCard ⓘ
linked to:
CharlieCard
Student CharlieCard ⓘ
linked to:
CharlieCard
|
| introducedBy |
Massachusetts Bay Transportation Authority
ⓘ
linked to:
MBTA
|
| locatedInArea |
Boston
ⓘ
linked to:
Boston, Massachusetts
Massachusetts ⓘ |
| mediaType | plastic card ⓘ |
| namedAfter | fictional rider Charlie ⓘ |
| operator |
MBTA
ⓘ
Massachusetts Bay Transportation Authority ⓘ
linked to:
MBTA
|
| paymentMethod |
passes
ⓘ
stored value ⓘ |
| regionServed | Greater Boston ⓘ |
| replaced | MBTA tokens ⓘ |
| reusability | reusable ⓘ |
| sector | public transportation ⓘ |
| technology | contactless smart card technology ⓘ |
| topUpMethod |
fare vending machine
ⓘ
online account ⓘ retail sales location ⓘ |
| usedFor |
bus fare payment
ⓘ
commuter rail fare payment ⓘ ferry fare payment ⓘ public transit fare payment ⓘ subway fare payment ⓘ |
| validOn |
MBTA Blue Line
ⓘ
MBTA Green Line ⓘ MBTA Orange Line ⓘ MBTA Red Line ⓘ MBTA Silver Line ⓘ MBTA bus ⓘ
linked to:
MBTA bus network
MBTA subway ⓘ
linked to:
MBTA
some MBTA commuter rail services ⓘ some MBTA ferry services ⓘ |
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 CharlieCard Description of subject: The MBTA CharlieCard is a reusable contactless smart card used to pay fares on Boston’s public transit system, including subways, buses, and some commuter rail and ferry services.
Referenced by (22)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: MBTA CharlieCard
linked to: MBTA CharlieCard
subject linked to:
Green Line
linked to: MBTA CharlieCard