Keystone Service
E145760
Keystone Service is an Amtrak-operated passenger rail service in Pennsylvania that provides frequent regional connections, primarily between Harrisburg and New York City via Philadelphia.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Keystone Service canonical | 13 |
| Keystone Service route | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T1274635 — 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: Keystone Service Context triple: [Keystone Corridor, usedByService, Keystone Service]
-
A.
Serving Gateway
The Serving Gateway is a core network node in LTE/EPC architectures that routes and forwards user data packets between base stations and the packet data network.
-
B.
Apex Cloud
Apex Cloud is an interstellar cloud located in the solar neighborhood, situated near the Local Interstellar Cloud through which our Solar System is currently passing.
-
C.
Kii Channel
The Kii Channel is a strait in western Japan that separates the islands of Honshu and Shikoku and links the Seto Inland Sea with the Pacific Ocean.
-
D.
Kerberos
Kerberos is a small, irregularly shaped moon of Pluto discovered in 2011 as part of the Pluto system’s complex family of satellites.
-
E.
Overture Services
Overture Services was an early pioneer in pay-per-click search advertising, best known for powering sponsored search results for major web portals in the late 1990s and early 2000s.
- 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: Keystone Service Target entity description: Keystone Service is an Amtrak-operated passenger rail service in Pennsylvania that provides frequent regional connections, primarily between Harrisburg and New York City via Philadelphia.
-
A.
Serving Gateway
The Serving Gateway is a core network node in LTE/EPC architectures that routes and forwards user data packets between base stations and the packet data network.
-
B.
Apex Cloud
Apex Cloud is an interstellar cloud located in the solar neighborhood, situated near the Local Interstellar Cloud through which our Solar System is currently passing.
-
C.
Kii Channel
The Kii Channel is a strait in western Japan that separates the islands of Honshu and Shikoku and links the Seto Inland Sea with the Pacific Ocean.
-
D.
Kerberos
Kerberos is a small, irregularly shaped moon of Pluto discovered in 2011 as part of the Pluto system’s complex family of satellites.
-
E.
Overture Services
Overture Services was an early pioneer in pay-per-click search advertising, best known for powering sponsored search results for major web portals in the late 1990s and early 2000s.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Amtrak train service
ⓘ
passenger rail service ⓘ |
| branding | Amtrak Keystone Service ⓘ |
| connection |
Acela
ⓘ
Northeast Regional ⓘ Pennsylvanian ⓘ |
| connectionHub |
Harrisburg Transportation Center
ⓘ
New York Penn Station ⓘ
linked to:
Penn Station (New York City)
Philadelphia 30th Street Station ⓘ
linked to:
30th Street Station
|
| connectsCity |
Harrisburg, Pennsylvania
ⓘ
Lancaster, Pennsylvania ⓘ New York City, New York ⓘ
linked to:
New York City
Philadelphia, Pennsylvania ⓘ
linked to:
Philadelphia
|
| country |
United States
ⓘ
linked to:
United States of America
|
| electrification |
electrified between Harrisburg and Philadelphia
ⓘ
electrified between Philadelphia and New York City ⓘ |
| fareSystem | reserved coach seating ⓘ |
| frequencyCharacteristic | high-frequency regional service ⓘ |
| fundingModel | state-supported Amtrak route ⓘ |
| gauge | standard gauge ⓘ |
| infrastructureOwner |
Amtrak (for Northeast Corridor segments)
ⓘ
linked to:
Amtrak
|
| majorStop |
Philadelphia 30th Street Station
ⓘ
linked to:
30th Street Station
|
| notableFeature | provides direct rail link between Pennsylvania state capital and New York City via Philadelphia ⓘ |
| onboardClass | Coach ⓘ |
| operatesIn |
New York (state)
ⓘ
linked to:
New York
Pennsylvania ⓘ |
| operator | Amtrak ⓘ |
| ownerOfInfrastructure |
Pennsylvania Department of Transportation (for Keystone Corridor west of Philadelphia)
ⓘ
linked to:
Pennsylvania Department of Transportation
|
| primaryCorridor | Harrisburg–Philadelphia–New York City ⓘ |
| primaryUse | passenger transportation ⓘ |
| provides | frequent daily service ⓘ |
| regionServed |
Central Pennsylvania
ⓘ
New York metropolitan area ⓘ Southeastern Pennsylvania ⓘ |
| rollingStockType |
Amfleet passenger cars
ⓘ
linked to:
Amfleet railcar family
electric locomotive-hauled trains (on electrified segments) ⓘ |
| routeVia | Philadelphia ⓘ |
| safetySystem |
Positive Train Control (on equipped segments)
ⓘ
linked to:
Positive Train Control
|
| serviceType |
intercity rail
ⓘ
regional rail ⓘ |
| sponsor | Pennsylvania Department of Transportation ⓘ |
| terminus |
Harrisburg Transportation Center
ⓘ
New York Penn Station ⓘ
linked to:
Penn Station (New York City)
|
| ticketingIntegration |
Amtrak Northeast Corridor services
ⓘ
linked to:
Amtrak Northeast Corridor routes
|
| trackConfiguration | shared with freight and other passenger services ⓘ |
| usesLine |
Harrisburg Line
ⓘ
linked to:
Philadelphia to Harrisburg Main Line
Keystone Corridor ⓘ Northeast Corridor ⓘ |
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: Keystone Service Description of subject: Keystone Service is an Amtrak-operated passenger rail service in Pennsylvania that provides frequent regional connections, primarily between Harrisburg and New York City via Philadelphia.
Referenced by (15)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Keystone Service
linked to: Keystone Service