Mattapan Line

E140142

light rail line public transit line trolley line

The Mattapan Line is a light rail trolley service in Boston, Massachusetts, operating as part of the MBTA's Red Line system between Ashmont and Mattapan.

Try in SPARQL Jump to: Surface forms Statements Referenced by

All labels observed (4)

Label	Occurrences
Mattapan trolley line	5
Mattapan Line canonical	3
Ashmont–Mattapan High-Speed Line tracks	1
Mattapan Line (MBTA)	1

Statements (45)

Predicate	Object
instanceOf	light rail line ⓘ public transit line ⓘ trolley line ⓘ
colorDesignation	Red ⓘ
connectsWith	Ashmont–Braintree branch of the Red Line ⓘ surface form: Ashmont–Braintree branch Red Line ⓘ
electrification	overhead line ⓘ
endPoint	Mattapan station ⓘ
fareSystem	MBTA fare system ⓘ
formerUsage	New York, New Haven and Hartford Railroad ⓘ surface form: New York, New Haven and Hartford Railroad branch line
hasHeritageRollingStock	PCC streetcar ⓘ surface form: PCC streetcar fleet
hasMode	rail ⓘ
hasStation	Ashmont station ⓘ Butler station ⓘ Capen Street station ⓘ Cedar Grove station ⓘ Central Avenue station ⓘ Mattapan station ⓘ Milton station ⓘ Valley Road station ⓘ
isBranchOf	Red Line ⓘ
isShuttleFor	MBTA Ashmont Branch ⓘ surface form: Ashmont–Mattapan corridor
lineLength	approximately 2.6 miles ⓘ
locatedIn	Boston, Massachusetts ⓘ surface form: Boston Massachusetts ⓘ United States of America ⓘ surface form: United States
numberOfStations	8 ⓘ
opened	1929 ⓘ
operator	MBTA ⓘ surface form: Massachusetts Bay Transportation Authority
owner	MBTA ⓘ surface form: Massachusetts Bay Transportation Authority
partOf	MBTA Red Line ⓘ
region	Greater Boston ⓘ
servesMunicipality	Milton, Massachusetts NERFINISHED ⓘ
servesNeighborhood	Dorchester ⓘ Mattapan ⓘ
serviceType	light rail ⓘ trolley ⓘ
startPoint	Ashmont station ⓘ
system	MBTA ⓘ surface form: MBTA subway
terminus	Ashmont station ⓘ Mattapan station ⓘ
trackConfiguration	single track with passing sidings ⓘ
trackGauge	standard gauge ⓘ
usesPowerSupply	600 V DC overhead ⓘ
usesRollingStock	PCC streetcar ⓘ

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: Mattapan Line
Description of subject: The Mattapan Line is a light rail trolley service in Boston, Massachusetts, operating as part of the MBTA's Red Line system between Ashmont and Mattapan.

Referenced by (10)

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

Mattapan Trolley → shortName → Mattapan Line ⓘ

MBTA Mattapan High-Speed Line → alsoKnownAs → Mattapan Line ⓘ

Butler station → servedByLine → Mattapan Line ⓘ