Mackinac Bridge Authority

E249011

government agency public agency transportation authority

The Mackinac Bridge Authority is a public agency responsible for operating, managing, and overseeing the finances and maintenance of Michigan’s Mackinac Bridge.

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All labels observed (1)

Label	Occurrences
Mackinac Bridge Authority canonical	5

Statements (48)

Predicate	Object
instanceOf	government agency ⓘ public agency ⓘ transportation authority ⓘ
communicatesWith	Michigan Department of Transportation ⓘ
country	United States of America ⓘ surface form: United States
employs	administrative staff ⓘ bridge maintenance workers ⓘ toll collectors ⓘ
governs	policies for Mackinac Bridge use ⓘ
hasDomain	bridge engineering oversight ⓘ public infrastructure management ⓘ
headquartersLocation	Mackinaw City, Michigan ⓘ St. Ignace, Michigan ⓘ
implements	bridge closure procedures when necessary ⓘ traffic restrictions during high winds ⓘ
industry	toll road operations ⓘ transportation infrastructure ⓘ
jurisdiction	Straits of Mackinac crossing ⓘ
locatedInTimeZone	Eastern Time Zone ⓘ
maintains	Mackinac Bridge ⓘ
manages	Mackinac Bridge ⓘ
monitors	traffic conditions on Mackinac Bridge ⓘ wind conditions on Mackinac Bridge ⓘ
operates	Mackinac Bridge ⓘ
oversees	inspection of Mackinac Bridge ⓘ safety of Mackinac Bridge ⓘ structural maintenance of Mackinac Bridge ⓘ
parentOrganization	Michigan ⓘ surface form: State of Michigan
partOf	government of Michigan ⓘ surface form: Government of Michigan
regulates	traffic on Mackinac Bridge ⓘ
responsibleFor	deck resurfacing of Mackinac Bridge ⓘ finances of Mackinac Bridge ⓘ lighting of Mackinac Bridge ⓘ maintenance of Mackinac Bridge ⓘ operation of Mackinac Bridge ⓘ painting of Mackinac Bridge ⓘ security of Mackinac Bridge ⓘ winter maintenance of Mackinac Bridge ⓘ
serviceProvided	bridge crossing services ⓘ bridge maintenance services ⓘ toll collection ⓘ
sets	Mackinac Bridge toll rates ⓘ
state	Michigan (most of state) ⓘ surface form: Michigan
subjectTo	United States federal transportation regulations ⓘ laws of the State of Michigan ⓘ
uses	toll revenue for bridge maintenance ⓘ toll revenue for bridge operations ⓘ
website	https://www.mackinacbridge.org/ ⓘ

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: Mackinac Bridge Authority
Description of subject: The Mackinac Bridge Authority is a public agency responsible for operating, managing, and overseeing the finances and maintenance of Michigan’s Mackinac Bridge.

Referenced by (5)

Full triples — surface form annotated when it differs from this entity's canonical label.

Mackinac Bridge → maintainedBy → Mackinac Bridge Authority ⓘ

Mighty Mac → maintainedBy → Mackinac Bridge Authority ⓘ

subject surface form: Mackinac Bridge

Big Mac → maintainedBy → Mackinac Bridge Authority ⓘ

Big Mac → openedBy → Mackinac Bridge Authority ⓘ

Mackinac Bridge Walk → organizer → Mackinac Bridge Authority ⓘ