Haystack Landing Bridge
E795539
Haystack Landing Bridge is a historic railroad swing bridge in Petaluma, California, that carries Northwestern Pacific Railroad tracks across the Petaluma River.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Haystack Bridge | 1 |
| Haystack Landing Bridge canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9285536 — 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: Haystack Landing Bridge Context triple: [Northwestern Pacific Railroad, hasBridge, Haystack Landing Bridge]
-
A.
Berkley Bridge
The Berkley Bridge is a major highway drawbridge in Norfolk, Virginia, carrying Interstate 264 traffic across the Eastern Branch of the Elizabeth River.
-
B.
Hudson Memorial Bridge
The Hudson Memorial Bridge is a major highway bridge spanning the Tennessee River in Decatur, Alabama, serving as a key transportation link in the region.
-
C.
Broadway Bridge
The Broadway Bridge is a movable bridge in New York City that carries Broadway and the subway across the Harlem River between Manhattan and the Bronx.
-
D.
Broadway Bridge
The Broadway Bridge is a historic steel truss bascule bridge spanning the Willamette River in Portland, Oregon, carrying both road traffic and light rail.
-
E.
Broadway Bridge
Broadway Bridge is a prominent historic arch bridge in Saskatoon, Saskatchewan, known for carrying traffic across the South Saskatchewan River and serving as a key city landmark.
- 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: Haystack Landing Bridge Target entity description: Haystack Landing Bridge is a historic railroad swing bridge in Petaluma, California, that carries Northwestern Pacific Railroad tracks across the Petaluma River.
-
A.
Berkley Bridge
The Berkley Bridge is a major highway drawbridge in Norfolk, Virginia, carrying Interstate 264 traffic across the Eastern Branch of the Elizabeth River.
-
B.
Hudson Memorial Bridge
The Hudson Memorial Bridge is a major highway bridge spanning the Tennessee River in Decatur, Alabama, serving as a key transportation link in the region.
-
C.
Broadway Bridge
The Broadway Bridge is a movable bridge in New York City that carries Broadway and the subway across the Harlem River between Manhattan and the Bronx.
-
D.
Broadway Bridge
The Broadway Bridge is a historic steel truss bascule bridge spanning the Willamette River in Portland, Oregon, carrying both road traffic and light rail.
-
E.
Broadway Bridge
Broadway Bridge is a prominent historic arch bridge in Saskatoon, Saskatchewan, known for carrying traffic across the South Saskatchewan River and serving as a key city landmark.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
historic bridge
ⓘ
railroad bridge ⓘ swing bridge ⓘ truss bridge ⓘ |
| carries | Northwestern Pacific Railroad ⓘ |
| crosses | Petaluma River ⓘ |
| crossesWaterBodyType | tidal river ⓘ |
| hasAlternativeName |
Haystack Bridge
ⓘ
linked to:
Haystack Landing Bridge
Haystack Landing Railroad Bridge ⓘ |
| hasFunction |
to allow rail traffic to cross Petaluma River
ⓘ
to swing open for marine navigation ⓘ |
| hasMovableSpanType | swing span ⓘ |
| hasNavigationClearanceType | movable span for vessel passage ⓘ |
| hasRiverMile | approximately river mile 12 on Petaluma River ⓘ |
| hasStructureType | steel truss ⓘ |
| isHistoric | true ⓘ |
| locatedIn |
California
ⓘ
linked to:
California, United States
Petaluma, California ⓘ Sonoma County, California ⓘ United States ⓘ
linked to:
United States of America
|
| material | steel ⓘ |
| near |
U.S. Route 101 crossing of Petaluma River
ⓘ
linked to:
Petaluma River Bridge
downtown Petaluma ⓘ
linked to:
Downtown Petaluma Historic District
|
| ownedBy |
Sonoma-Marin Area Rail Transit
ⓘ
linked to:
Sonoma–Marin Area Rail Transit
|
| partOf |
Northwestern Pacific Railroad line
ⓘ
linked to:
Northwestern Pacific Railroad
|
| usedBy |
Sonoma-Marin Area Rail Transit
ⓘ
linked to:
Sonoma–Marin Area Rail Transit
freight rail operators on Northwestern Pacific Railroad ⓘ |
| usedFor |
freight rail service
ⓘ
passenger rail service ⓘ rail transport ⓘ |
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: Haystack Landing Bridge Description of subject: Haystack Landing Bridge is a historic railroad swing bridge in Petaluma, California, that carries Northwestern Pacific Railroad tracks across the Petaluma River.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Haystack Landing Bridge