Tobu 50050 series
E145468
The Tobu 50050 series is a Japanese electric multiple unit train operated by Tobu Railway, designed for through-services with Tokyo Metro and known for its modern commuter-oriented features.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Tobu 50070 series | 4 |
| Tobu 50000 series | 2 |
| Tobu 50050 series canonical | 2 |
| Tobu 50000 series family | 1 |
| Tobu 50090 series | 1 |
| Tōbu 50070 series | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1183172 — 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: Tobu 50050 series Context triple: [Tokyo Metro Hanzomon Line, rollingStock, Tobu 50050 series]
-
A.
Tobu 9000 series
The Tobu 9000 series is a Japanese electric multiple unit train type operated by Tobu Railway, commonly used for inter-running services with Tokyo Metro lines in the Tokyo metropolitan area.
-
B.
Tokyu 5050 series
The Tokyu 5050 series is a Japanese electric multiple unit commuter train type operated by Tokyu Corporation and used on through-services with Tokyo Metro and other railway lines in the Tokyo area.
-
C.
Tokyo Metro 1000 series
The Tokyo Metro 1000 series is a modern electric multiple unit train used on Tokyo’s subway system, designed with retro-inspired styling that pays homage to the original Ginza Line cars while incorporating contemporary technology and comfort features.
-
D.
Tokyo Metro 10000 series
The Tokyo Metro 10000 series is a fleet of modern electric multiple unit trains operated by Tokyo Metro, known for serving through-services on several interconnected subway and private railway lines in the Tokyo area.
-
E.
Seibu 6000 series
The Seibu 6000 series is a Japanese electric multiple unit train type operated by Seibu Railway, commonly used for through-services on Tokyo subway lines.
- 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: Tobu 50050 series Target entity description: The Tobu 50050 series is a Japanese electric multiple unit train operated by Tobu Railway, designed for through-services with Tokyo Metro and known for its modern commuter-oriented features.
-
A.
Tobu 9000 series
The Tobu 9000 series is a Japanese electric multiple unit train type operated by Tobu Railway, commonly used for inter-running services with Tokyo Metro lines in the Tokyo metropolitan area.
-
B.
Tokyu 5050 series
The Tokyu 5050 series is a Japanese electric multiple unit commuter train type operated by Tokyu Corporation and used on through-services with Tokyo Metro and other railway lines in the Tokyo area.
-
C.
Tokyo Metro 1000 series
The Tokyo Metro 1000 series is a modern electric multiple unit train used on Tokyo’s subway system, designed with retro-inspired styling that pays homage to the original Ginza Line cars while incorporating contemporary technology and comfort features.
-
D.
Tokyo Metro 10000 series
The Tokyo Metro 10000 series is a fleet of modern electric multiple unit trains operated by Tokyo Metro, known for serving through-services on several interconnected subway and private railway lines in the Tokyo area.
-
E.
Seibu 6000 series
The Seibu 6000 series is a Japanese electric multiple unit train type operated by Seibu Railway, commonly used for through-services on Tokyo subway lines.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
commuter train
ⓘ
electric multiple unit ⓘ |
| brakeType |
electro-pneumatic brake
ⓘ
regenerative brake ⓘ |
| carBodyMaterial | aluminium alloy ⓘ |
| country | Japan ⓘ |
| designedBy | Tobu Railway ⓘ |
| designedFor |
commuter services
ⓘ
high-frequency urban commuter corridors ⓘ interoperability with multiple operators ⓘ one-man operation capability on some sections ⓘ through services with Tokyo Metro ⓘ |
| doorConfiguration | 4 pairs per side per car ⓘ |
| electrificationSystem | 1,500 V DC overhead catenary ⓘ |
| enteredServiceOnLine |
Tobu Isesaki Line
ⓘ
Tobu Skytree Line ⓘ Tokyo Metro Hanzomon Line ⓘ Tokyu Den-en-toshi Line ⓘ |
| family |
Tobu 50050 series
self-linksurface differs
ⓘ
surface form:
Tobu 50000 series family
|
| formation | 10-car sets ⓘ |
| hasCabType | full-width cab ⓘ |
| hasFeature |
LCD passenger information displays
ⓘ
LED destination indicators ⓘ air conditioning ⓘ priority seating ⓘ through-gangways between cars ⓘ wheelchair space ⓘ |
| hasInteriorFeature |
hanging straps
ⓘ
luggage racks ⓘ stainless steel grab poles ⓘ |
| hasSeatingType | longitudinal bench seating ⓘ |
| introduced | 2006 ⓘ |
| numberOfCarsPerSet | 10 ⓘ |
| operator |
Tobu Railway
ⓘ
Tokyo Metro (through service) ⓘ Tokyu Corporation ⓘ
surface form:
Tokyu Corporation (through service)
|
| powerCollectionMethod | pantograph ⓘ |
| regionServed |
Tokyo metropolitan area
ⓘ
surface form:
Greater Tokyo Area
|
| relatedTo |
Tobu 50050 series
self-linksurface differs
ⓘ
surface form:
Tobu 50000 series
Tobu 50050 series self-linksurface differs ⓘ
surface form:
Tobu 50070 series
|
| safetySystem |
Tobu ATS
ⓘ
Tokyo Metro CS-ATC ⓘ Tokyu ATS ⓘ |
| serviceStatus | in regular operation ⓘ |
| serviceType |
all-stations (local) services
ⓘ
rapid services ⓘ |
| trackGauge | 1,067 mm ⓘ |
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: Tobu 50050 series Description of subject: The Tobu 50050 series is a Japanese electric multiple unit train operated by Tobu Railway, designed for through-services with Tokyo Metro and known for its modern commuter-oriented features.
Referenced by (11)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Tobu 50070 series
this entity surface form:
Tobu 50000 series family
this entity surface form:
Tobu 50000 series
this entity surface form:
Tobu 50070 series
this entity surface form:
Tobu 50070 series
this entity surface form:
Tobu 50000 series
this entity surface form:
Tobu 50090 series
this entity surface form:
Tobu 50070 series
this entity surface form:
Tōbu 50070 series