CharlieCard
E3327
The CharlieCard is a reusable contactless smart card used to pay fares on Boston's MBTA public transit system.
All labels observed (8)
| Label | Occurrences |
|---|---|
| CharlieCard canonical | 68 |
| CharlieCard system | 5 |
| Senior CharlieCard | 2 |
| CharlieCard (for some products) | 1 |
| CharlieCard not accepted on-board | 1 |
| Corporate Pass CharlieCard | 1 |
| Disability CharlieCard | 1 |
| Student CharlieCard | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T38472 — 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: CharlieCard Context triple: [MBTA Red Line, fareSystem, CharlieCard]
-
A.
Ventra
Ventra is the contactless fare payment system used across Chicago’s public transit network, including buses and trains.
-
B.
CCC
The CCC, or Civilian Conservation Corps, was a New Deal work relief program in the United States during the 1930s and early 1940s that employed young men in conservation and public works projects such as reforestation, park development, and soil erosion control.
-
C.
Crown
The Crown is the institution representing the British monarchy and the executive authority of the state, distinct from Parliament and the judiciary.
-
D.
NFC
The NFC (National Football Conference) is one of the two conferences in the National Football League, comprising 16 teams that compete for a spot in the Super Bowl.
-
E.
Coinstar
Coinstar is a company best known for its self-service coin-counting kiosks commonly found in supermarkets and retail stores.
- 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: CharlieCard Target entity description: The CharlieCard is a reusable contactless smart card used to pay fares on Boston's MBTA public transit system.
-
A.
Ventra
Ventra is the contactless fare payment system used across Chicago’s public transit network, including buses and trains.
-
B.
CCC
The CCC, or Civilian Conservation Corps, was a New Deal work relief program in the United States during the 1930s and early 1940s that employed young men in conservation and public works projects such as reforestation, park development, and soil erosion control.
-
C.
Crown
The Crown is the institution representing the British monarchy and the executive authority of the state, distinct from Parliament and the judiciary.
-
D.
NFC
The NFC (National Football Conference) is one of the two conferences in the National Football League, comprising 16 teams that compete for a spot in the Super Bowl.
-
E.
Coinstar
Coinstar is a company best known for its self-service coin-counting kiosks commonly found in supermarkets and retail stores.
- F. None of above. chosen
Statements (53)
| Predicate | Object |
|---|---|
| instanceOf |
contactless smart card
ⓘ
fare payment card ⓘ stored-value card ⓘ |
| canCarry |
link passes for combined modes
ⓘ
monthly passes ⓘ stored cash value ⓘ weekly passes ⓘ |
| cardType |
plastic smart card
ⓘ
reusable card ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| distributionPoint |
MBTA customer service locations
ⓘ
MBTA subway stations ⓘ selected retail outlets ⓘ |
| fareDiscount |
offers free transfers between certain MBTA services
ⓘ
offers lower fares than cash on buses and subways ⓘ |
| hasVariant |
Corporate Pass CharlieCard
ⓘ
linked to:
CharlieCard
Disability CharlieCard ⓘ
linked to:
CharlieCard
Employee CharlieCard ⓘ Senior CharlieCard ⓘ
linked to:
CharlieCard
Student CharlieCard ⓘ |
| inception | 2006 ⓘ |
| introducedBy | MBTA automated fare collection program ⓘ |
| locatedIn |
Boston
ⓘ
linked to:
Boston, Massachusetts
Massachusetts ⓘ |
| namedAfter |
fictional rider Charlie from the MTA song
ⓘ
song "Charlie on the MTA" ⓘ |
| operator |
MBTA
ⓘ
Massachusetts Bay Transportation Authority ⓘ
linked to:
MBTA
|
| paymentMethod |
stored monetary value
ⓘ
stored passes ⓘ |
| reloadMethod |
MBTA fare vending machines
ⓘ
online MBTA account management ⓘ participating retail sales locations ⓘ |
| replaced |
MBTA metal token
ⓘ
paper monthly passes on the MBTA ⓘ |
| replacedBy | MBTA contactless fare system "AFC 2.0" (planned) ⓘ |
| reusability | can be reloaded multiple times ⓘ |
| technology |
MIFARE-based smart card technology
ⓘ
contactless RFID ⓘ |
| usedFor |
paying bus fares in Boston
ⓘ
paying commuter rail fares on certain MBTA services ⓘ paying fares on MBTA ferries that accept it ⓘ paying fares on the MBTA ⓘ paying subway fares in Boston ⓘ |
| 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 zones when loaded with passes ⓘ some MBTA ferry routes when loaded with passes ⓘ |
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: CharlieCard Description of subject: The CharlieCard is a reusable contactless smart card used to pay fares on Boston's MBTA public transit system.
Referenced by (80)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: CharlieCard
linked to: CharlieCard
linked to: CharlieCard
subject linked to:
MBTA contactless fare system "AFC 2.0" (planned)
linked to: CharlieCard
subject linked to:
Central station (MBTA) on the Red Line
linked to: CharlieCard
linked to: CharlieCard
linked to: CharlieCard
subject linked to:
Blue Line
linked to: CharlieCard
subject linked to:
Kendall/MIT MBTA station
linked to: CharlieCard
linked to: CharlieCard