SR 520 Bridge
E445951
The SR 520 Bridge is a major floating bridge across Lake Washington in Seattle, Washington, known as one of the longest floating bridges in the world and a key link between Seattle and its eastern suburbs.
All labels observed (3)
| Label | Occurrences |
|---|---|
| SR 520 Bridge canonical | 2 |
| SR 520 bridge | 1 |
| State Route 520 floating bridge (western approach area) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2850779 — 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: SR 520 Bridge Context triple: [Evergreen Point Floating Bridge, alsoKnownAs, SR 520 Bridge]
-
A.
Yaquina Bay Bridge
The Yaquina Bay Bridge is an iconic 1930s Art Deco–style arch bridge on the Oregon coast, renowned for its elegant design and role as a key crossing on U.S. Route 101.
-
B.
Camano Gateway Bridge
The Camano Gateway Bridge is a roadway bridge in Washington State that provides the primary connection between Camano Island and the mainland.
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C.
Carquinez Bridge
Carquinez Bridge is a major twin-span steel bridge in the San Francisco Bay Area that carries Interstate 80 across the Carquinez Strait between Crockett and Vallejo.
-
D.
Marquam Bridge
The Marquam Bridge is a major double-decked freeway bridge in Portland, Oregon, carrying Interstate 5 across the Willamette River.
-
E.
Deception Pass Bridge
Deception Pass Bridge is a historic steel arch bridge in Washington State that dramatically spans the turbulent waters of Deception Pass, connecting Whidbey Island to Fidalgo Island.
- 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: SR 520 Bridge Target entity description: The SR 520 Bridge is a major floating bridge across Lake Washington in Seattle, Washington, known as one of the longest floating bridges in the world and a key link between Seattle and its eastern suburbs.
-
A.
Yaquina Bay Bridge
The Yaquina Bay Bridge is an iconic 1930s Art Deco–style arch bridge on the Oregon coast, renowned for its elegant design and role as a key crossing on U.S. Route 101.
-
B.
Camano Gateway Bridge
The Camano Gateway Bridge is a roadway bridge in Washington State that provides the primary connection between Camano Island and the mainland.
-
C.
Carquinez Bridge
Carquinez Bridge is a major twin-span steel bridge in the San Francisco Bay Area that carries Interstate 80 across the Carquinez Strait between Crockett and Vallejo.
-
D.
Marquam Bridge
The Marquam Bridge is a major double-decked freeway bridge in Portland, Oregon, carrying Interstate 5 across the Willamette River.
-
E.
Deception Pass Bridge
Deception Pass Bridge is a historic steel arch bridge in Washington State that dramatically spans the turbulent waters of Deception Pass, connecting Whidbey Island to Fidalgo Island.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
floating bridge
ⓘ
highway bridge ⓘ road bridge ⓘ |
| carries | Washington State Route 520 ⓘ |
| connects |
Medina
ⓘ
Seattle ⓘ Seattle and the Eastside suburbs ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crosses | Lake Washington ⓘ |
| design | pontoon-supported floating bridge ⓘ |
| environmentalContext | crosses a freshwater lake ⓘ |
| function | key transportation link between Seattle and eastern suburbs ⓘ |
| hasComponent |
anchor cables
ⓘ
pontoons ⓘ roadway deck ⓘ |
| hasFacility | shared-use path for bicycles and pedestrians ⓘ |
| hasLanes |
high-occupancy vehicle lanes
ⓘ
multiple general-purpose lanes ⓘ |
| importance | major east–west transportation corridor in Seattle metropolitan area ⓘ |
| knownAs |
520 bridge
ⓘ
Evergreen Point Bridge ⓘ |
| locatedIn |
King County, Washington
ⓘ
linked to:
King County
Seattle, Washington ⓘ
linked to:
Seattle, Washington, United States
Washington State ⓘ
linked to:
Washington
|
| maintainedBy | Washington State Department of Transportation ⓘ |
| near |
Medina waterfront
ⓘ
Montlake neighborhood of Seattle ⓘ University of Washington ⓘ |
| notableFor | being one of the longest floating bridges in the world ⓘ |
| officialName | Evergreen Point Floating Bridge ⓘ |
| owner | Washington State Department of Transportation ⓘ |
| parallelTo | Interstate 90 Lake Washington crossing ⓘ |
| partOf |
State Route 520 corridor
ⓘ
linked to:
State Route 520
|
| predecessor |
1963 Evergreen Point Floating Bridge
ⓘ
linked to:
Evergreen Point Floating Bridge
|
| purpose | increase capacity and improve safety over Lake Washington ⓘ |
| regionServed | Puget Sound region ⓘ |
| replaced | original Evergreen Point Floating Bridge ⓘ |
| roadType | limited-access highway ⓘ |
| role | critical infrastructure for regional mobility ⓘ |
| safetyFeatures |
barrier-separated lanes
ⓘ
modern seismic design ⓘ wider shoulders ⓘ |
| serves | commuters between Seattle and Eastside technology hubs ⓘ |
| tollCollection | electronic tolling ⓘ |
| tollStatus | tolled facility ⓘ |
| trafficType |
bicycles
ⓘ
motor vehicles ⓘ pedestrians ⓘ |
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: SR 520 Bridge Description of subject: The SR 520 Bridge is a major floating bridge across Lake Washington in Seattle, Washington, known as one of the longest floating bridges in the world and a key link between Seattle and its eastern suburbs.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: SR 520 Bridge