Alcatraz Island ferry terminal
E51054
The Alcatraz Island ferry terminal is the waterfront departure point in San Francisco where visitors board boats to reach the historic Alcatraz prison island in San Francisco Bay.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Alcatraz Island ferry terminal canonical | 1 |
| Pier 33 Alcatraz Landing | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T390764 — 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: Alcatraz Island ferry terminal Context triple: [Aquarium of the Bay, near, Alcatraz Island ferry terminal]
-
A.
Pier 39
Pier 39 is a popular waterfront shopping, dining, and entertainment complex in San Francisco best known for its sea lions, bay views, and tourist attractions.
-
B.
Alcatraz Island
Alcatraz Island is a small rocky island in San Francisco Bay best known for its former maximum-security federal prison, which once held some of America’s most notorious criminals and is now a popular historic site and tourist attraction.
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C.
Pier 57
Pier 57 is a historic waterfront pier and entertainment complex on Seattle’s Elliott Bay, featuring restaurants, shops, and attractions along the city’s central waterfront.
-
D.
Fisherman’s Wharf
Fisherman’s Wharf is a popular waterfront neighborhood and tourist destination in San Francisco known for its seafood restaurants, historic piers, and views of the bay and Alcatraz Island.
-
E.
Port of San Francisco
The Port of San Francisco is a major maritime facility and waterfront district on the city’s eastern shoreline, serving as a hub for cargo, ferries, cruise ships, and commercial development.
- 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: Alcatraz Island ferry terminal Target entity description: The Alcatraz Island ferry terminal is the waterfront departure point in San Francisco where visitors board boats to reach the historic Alcatraz prison island in San Francisco Bay.
-
A.
Pier 39
Pier 39 is a popular waterfront shopping, dining, and entertainment complex in San Francisco best known for its sea lions, bay views, and tourist attractions.
-
B.
Alcatraz Island
Alcatraz Island is a small rocky island in San Francisco Bay best known for its former maximum-security federal prison, which once held some of America’s most notorious criminals and is now a popular historic site and tourist attraction.
-
C.
Pier 57
Pier 57 is a historic waterfront pier and entertainment complex on Seattle’s Elliott Bay, featuring restaurants, shops, and attractions along the city’s central waterfront.
-
D.
Fisherman’s Wharf
Fisherman’s Wharf is a popular waterfront neighborhood and tourist destination in San Francisco known for its seafood restaurants, historic piers, and views of the bay and Alcatraz Island.
-
E.
Port of San Francisco
The Port of San Francisco is a major maritime facility and waterfront district on the city’s eastern shoreline, serving as a hub for cargo, ferries, cruise ships, and commercial development.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
ferry terminal
ⓘ
tourist infrastructure ⓘ transportation facility ⓘ |
| associatedWithAttraction |
Alcatraz Federal Penitentiary
ⓘ
linked to:
Alcatraz Island
Alcatraz Island ⓘ Golden Gate National Recreation Area ⓘ |
| connects |
Alcatraz Island
ⓘ
San Francisco waterfront ⓘ
linked to:
Port of San Francisco
|
| hasAccessMode |
boat
ⓘ
ferry ⓘ |
| hasFeature |
boarding ramps
ⓘ
docks for ferries ⓘ passenger waiting area ⓘ ticketing facilities ⓘ |
| hasViewOf |
Alcatraz Island
ⓘ
San Francisco Bay ⓘ San Francisco skyline ⓘ
linked to:
Downtown San Francisco
|
| locatedIn |
California
ⓘ
linked to:
California, United States
San Francisco ⓘ San Francisco Bay Area ⓘ United States ⓘ
linked to:
United States of America
|
| locatedOnWaterbody | San Francisco Bay ⓘ |
| nearbyAttraction |
Fisherman’s Wharf area
ⓘ
linked to:
Fisherman’s Wharf
San Francisco waterfront ⓘ
linked to:
Port of San Francisco
|
| operatedFor | National Park Service visitors ⓘ |
| partOf | Alcatraz Island visitor infrastructure ⓘ |
| primaryFunction | boarding point for ferries to Alcatraz Island ⓘ |
| primaryUsePeriod | daytime hours ⓘ |
| relatedTo |
Alcatraz Island tours
ⓘ
heritage tourism in San Francisco Bay ⓘ |
| safetyRequirement |
coast guard–compliant operations
ⓘ
regulated passenger boarding ⓘ |
| servesDestination |
Alcatraz Federal Penitentiary (historic site)
ⓘ
linked to:
Alcatraz Island
Alcatraz Island ⓘ |
| tourismSignificance |
major gateway to Alcatraz Island tours
ⓘ
popular visitor embarkation point ⓘ |
| transportTypeServed | passenger ferry ⓘ |
| typicalUsers |
local visitors
ⓘ
sightseers ⓘ tourists ⓘ |
| usedFor |
access to historic prison site
ⓘ
scheduled ferry arrivals ⓘ scheduled ferry departures ⓘ sightseeing tours ⓘ tourist transportation ⓘ |
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: Alcatraz Island ferry terminal Description of subject: The Alcatraz Island ferry terminal is the waterfront departure point in San Francisco where visitors board boats to reach the historic Alcatraz prison island in San Francisco Bay.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Alcatraz Island ferry terminal