Alcatraz City Cruises
E16330
Alcatraz City Cruises is a ferry company that provides official passenger transportation and tour services to and from Alcatraz Island in San Francisco Bay.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Alcatraz City Cruises canonical | 2 |
| Alcatraz Cruises | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T138159 — 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 City Cruises Context triple: [Alcatraz Island, ferryOperator, Alcatraz City Cruises]
-
A.
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.
-
B.
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.
-
C.
SamTrans
SamTrans is the public bus and paratransit agency serving San Mateo County and parts of the San Francisco Bay Area.
-
D.
San Francisco Maritime National Historical Park
San Francisco Maritime National Historical Park is a waterfront national historical park in San Francisco that preserves and interprets the city’s rich maritime heritage through historic ships, a museum, and educational exhibits.
-
E.
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.
- 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 City Cruises Target entity description: Alcatraz City Cruises is a ferry company that provides official passenger transportation and tour services to and from Alcatraz Island in San Francisco Bay.
-
A.
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.
-
B.
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.
-
C.
SamTrans
SamTrans is the public bus and paratransit agency serving San Mateo County and parts of the San Francisco Bay Area.
-
D.
San Francisco Maritime National Historical Park
San Francisco Maritime National Historical Park is a waterfront national historical park in San Francisco that preserves and interprets the city’s rich maritime heritage through historic ships, a museum, and educational exhibits.
-
E.
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.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
ferry company
ⓘ
tour operator ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| formerlyKnownAs |
Alcatraz Cruises
ⓘ
linked to:
Alcatraz City Cruises
|
| hasExclusiveContractFor | public ferry service to Alcatraz Island ⓘ |
| hasWebsite | https://www.cityexperiences.com/san-francisco/city-cruises/alcatraz/ ⓘ |
| industry |
maritime transportation
ⓘ
tourism ⓘ |
| isOfficialProviderFor | Alcatraz Island passenger ferry service ⓘ |
| offersTourType |
audio-guided Alcatraz tours
ⓘ
combination tours with San Francisco Bay cruises ⓘ day tours of Alcatraz Island ⓘ guided Alcatraz tours ⓘ night tours of Alcatraz Island ⓘ |
| operatesIn |
San Francisco Bay
ⓘ
San Francisco, California ⓘ
linked to:
San Francisco
|
| parentCompany |
City Experiences
ⓘ
Hornblower Group ⓘ
linked to:
Hornblower Cruises
|
| portOfDeparture |
Pier 33
ⓘ
San Francisco waterfront ⓘ
linked to:
Port of San Francisco
|
| primaryRoute |
San Francisco – Alcatraz Island
ⓘ
linked to:
Alcatraz Island
|
| providesServiceTo | Alcatraz Island ⓘ |
| serviceType |
cruise service
ⓘ
passenger ferry service ⓘ sightseeing tours ⓘ |
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 City Cruises Description of subject: Alcatraz City Cruises is a ferry company that provides official passenger transportation and tour services to and from Alcatraz Island in San Francisco Bay.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Alcatraz City Cruises
linked to: Alcatraz City Cruises