81-760/761 Oka
E898414
The 81-760/761 "Oka" is a modern Russian metro train series designed for improved efficiency, comfort, and reliability in urban rail systems, succeeding the earlier 81-740/741 "Rusich" models.
All labels observed (3)
| Label | Occurrences |
|---|---|
| 81-760/761 Oka canonical | 1 |
| 81-761 Oka | 1 |
| 81-764 Oka | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10989511 — 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: 81-760/761 Oka Context triple: [81-740/741 Rusich, successor, 81-760/761 Oka]
-
A.
OKA
OKA is the IATA airport code for Naha Airport, the main air gateway to Okinawa, Japan.
-
B.
Oka
Oka is a small municipality in southwestern Quebec, Canada, known for its historic village, Oka National Park, and the famous Oka cheese produced by Trappist monks.
-
C.
OKAS
OKAS is the ICAO airport code assigned to Ali Al Salem Air Base, a key military airfield in Kuwait.
-
D.
Shibaura Futo
Shibaura Futo is a waterfront district and pier area in Tokyo’s Minato Ward, known for its views of Tokyo Bay and proximity to the Rainbow Bridge.
-
E.
Saigō-no-Tsubone
Saigō-no-Tsubone was a prominent Japanese noblewoman and concubine of Tokugawa Ieyasu who became an influential figure in the early Edo period through her role in the Tokugawa shogunate.
- 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: 81-760/761 Oka Target entity description: The 81-760/761 "Oka" is a modern Russian metro train series designed for improved efficiency, comfort, and reliability in urban rail systems, succeeding the earlier 81-740/741 "Rusich" models.
-
A.
OKA
OKA is the IATA airport code for Naha Airport, the main air gateway to Okinawa, Japan.
-
B.
Oka
Oka is a small municipality in southwestern Quebec, Canada, known for its historic village, Oka National Park, and the famous Oka cheese produced by Trappist monks.
-
C.
OKAS
OKAS is the ICAO airport code assigned to Ali Al Salem Air Base, a key military airfield in Kuwait.
-
D.
Shibaura Futo
Shibaura Futo is a waterfront district and pier area in Tokyo’s Minato Ward, known for its views of Tokyo Bay and proximity to the Rainbow Bridge.
-
E.
Saigō-no-Tsubone
Saigō-no-Tsubone was a prominent Japanese noblewoman and concubine of Tokugawa Ieyasu who became an influential figure in the early Edo period through her role in the Tokugawa shogunate.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
electric multiple unit
ⓘ
metro rolling stock ⓘ railway vehicle series ⓘ |
| brakeType |
electrodynamic brakes
ⓘ
pneumatic brakes ⓘ |
| controlSystem | microprocessor-based control ⓘ |
| countryOfOrigin | Russia ⓘ |
| designedBy |
Metrowagonmash
ⓘ
linked to:
Metrovagonmash
|
| designedFor |
frequent stop-and-go operation
ⓘ
harsh climate conditions ⓘ high passenger capacity ⓘ improved energy efficiency ⓘ improved passenger comfort ⓘ improved reliability ⓘ metro systems ⓘ urban rail systems ⓘ |
| doorType | sliding plug doors ⓘ |
| electricSystem | 825 V DC third rail ⓘ |
| family |
81-760 series
ⓘ
81-761 series ⓘ |
| hasFeature |
air conditioning
ⓘ
electronic destination displays ⓘ energy-efficient traction equipment ⓘ ergonomic seating ⓘ improved noise insulation ⓘ inter-car gangways in some configurations ⓘ modern interior lighting ⓘ passenger information system ⓘ regenerative braking capability ⓘ video surveillance ⓘ wide doorways ⓘ |
| hasVariant |
81-760
ⓘ
81-761 ⓘ |
| introducedAs | successor to 81-740/741 Rusich ⓘ |
| manufacturer |
Metrowagonmash
ⓘ
linked to:
Metrovagonmash
|
| namedAfter | Oka River ⓘ |
| operatingEnvironment | underground metro lines ⓘ |
| operator | Moscow Metro ⓘ |
| powerType | electric ⓘ |
| predecessor | 81-740/741 Rusich ⓘ |
| serviceType | rapid transit ⓘ |
| trackGauge | 1,520 mm ⓘ |
| trainsetFormation | multiple-car trainsets ⓘ |
| usedFor | passenger transport ⓘ |
| usedIn | Moscow Metro ⓘ |
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: 81-760/761 Oka Description of subject: The 81-760/761 "Oka" is a modern Russian metro train series designed for improved efficiency, comfort, and reliability in urban rail systems, succeeding the earlier 81-740/741 "Rusich" models.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
81-760 Oka metro train
linked to: 81-760/761 Oka
subject linked to:
81-760 Oka metro train
linked to: 81-760/761 Oka