Blue Line (MARTA)
E497577
The Blue Line (MARTA) is one of the primary heavy-rail rapid transit routes in the Metropolitan Atlanta Rapid Transit Authority system, running east–west across the Atlanta metropolitan area.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Blue Line (MARTA) canonical | 16 |
| MARTA Blue Line | 9 |
| MARTA Blue Line eastern segment | 1 |
| MARTA east–west line | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5119705 — 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: Blue Line (MARTA) Context triple: [Red Line (MARTA), sharesTrackageWith, Blue Line (MARTA)]
-
A.
Gold Line (MARTA)
The Gold Line (MARTA) is one of Atlanta’s primary rapid transit rail lines, running north–south through key destinations including downtown and Hartsfield–Jackson Atlanta International Airport.
-
B.
MARTA Red Line
The MARTA Red Line is a major rapid transit route in Atlanta’s Metropolitan Atlanta Rapid Transit Authority system, running north–south and serving key neighborhoods and business districts.
-
C.
MARTA Streetcar
MARTA Streetcar is a modern streetcar transit service operating in Atlanta, Georgia, providing local rail connections through key downtown and nearby neighborhoods.
-
D.
North Avenue MARTA station
North Avenue MARTA station is a rapid transit station on Atlanta’s Red and Gold lines, located in Midtown and serving as a key stop for commuters, students, and visitors in the city’s urban core.
-
E.
Metropolitan Atlanta Rapid Transit Authority (MARTA)
The Metropolitan Atlanta Rapid Transit Authority (MARTA) is the primary public transportation agency serving the Atlanta metropolitan area, operating a network of heavy rail, bus, and paratransit services.
- 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: Blue Line (MARTA) Target entity description: The Blue Line (MARTA) is one of the primary heavy-rail rapid transit routes in the Metropolitan Atlanta Rapid Transit Authority system, running east–west across the Atlanta metropolitan area.
-
A.
Gold Line (MARTA)
The Gold Line (MARTA) is one of Atlanta’s primary rapid transit rail lines, running north–south through key destinations including downtown and Hartsfield–Jackson Atlanta International Airport.
-
B.
MARTA Red Line
The MARTA Red Line is a major rapid transit route in Atlanta’s Metropolitan Atlanta Rapid Transit Authority system, running north–south and serving key neighborhoods and business districts.
-
C.
MARTA Streetcar
MARTA Streetcar is a modern streetcar transit service operating in Atlanta, Georgia, providing local rail connections through key downtown and nearby neighborhoods.
-
D.
North Avenue MARTA station
North Avenue MARTA station is a rapid transit station on Atlanta’s Red and Gold lines, located in Midtown and serving as a key stop for commuters, students, and visitors in the city’s urban core.
-
E.
Metropolitan Atlanta Rapid Transit Authority (MARTA)
The Metropolitan Atlanta Rapid Transit Authority (MARTA) is the primary public transportation agency serving the Atlanta metropolitan area, operating a network of heavy rail, bus, and paratransit services.
- F. None of above. chosen
Statements (24)
| Predicate | Object |
|---|---|
| instanceOf | rapid transit line ⓘ |
| color | blue ⓘ |
| connectsWith |
Gold Line (MARTA)
ⓘ
Green Line (MARTA) ⓘ Red Line (MARTA) ⓘ
linked to:
MARTA Red Line
|
| country |
United States
ⓘ
linked to:
United States of America
|
| direction | east–west ⓘ |
| electrification | third rail ⓘ |
| fareSystem | Breeze Card ⓘ |
| formerName | East–West Line ⓘ |
| governingBody | MARTA Board of Directors ⓘ |
| location |
Atlanta metropolitan area
ⓘ
linked to:
Atlanta urban area
|
| networkRole | primary trunk line ⓘ |
| operator | Metropolitan Atlanta Rapid Transit Authority ⓘ |
| owner | Metropolitan Atlanta Rapid Transit Authority ⓘ |
| partOf |
MARTA rapid transit network
ⓘ
linked to:
MARTA rail network
|
| region |
Metro Atlanta
ⓘ
linked to:
metro Atlanta
|
| servesCity |
Atlanta, Georgia
ⓘ
linked to:
Atlanta
|
| serviceArea |
DeKalb County, Georgia
ⓘ
Fulton County, Georgia ⓘ |
| serviceType | all-day service ⓘ |
| system |
MARTA Rail System
ⓘ
linked to:
MARTA rail network
|
| trackGauge | standard gauge ⓘ |
| transitType | heavy rail rapid transit ⓘ |
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: Blue Line (MARTA) Description of subject: The Blue Line (MARTA) is one of the primary heavy-rail rapid transit routes in the Metropolitan Atlanta Rapid Transit Authority system, running east–west across the Atlanta metropolitan area.
Referenced by (27)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Red Line
subject linked to:
Gold Line
subject linked to:
Green Line
subject linked to:
Green Line
linked to: Blue Line (MARTA)
linked to: Blue Line (MARTA)
subject linked to:
Dome/GWCC/Philips Arena/CNN Center MARTA station
linked to: Blue Line (MARTA)
linked to: Blue Line (MARTA)
linked to: Blue Line (MARTA)
linked to: Blue Line (MARTA)
linked to: Blue Line (MARTA)
linked to: Blue Line (MARTA)
linked to: Blue Line (MARTA)
linked to: Blue Line (MARTA)
linked to: Blue Line (MARTA)