MC252
E305564
MC252 is the Macondo Prospect offshore oil well in the Gulf of Mexico that was the source of the 2010 Deepwater Horizon oil spill.
All labels observed (1)
| Label | Occurrences |
|---|---|
| MC252 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2861451 — 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: MC252 Context triple: [Deepwater Horizon oil spill, wellDesignation, MC252]
-
A.
Mk2
The Mk2 is the second generation of the Volkswagen Golf, a popular compact car produced in the 1980s and early 1990s known for its improved refinement, safety, and performance over its predecessor.
-
B.
M-5
M-5 is a state highway in southeastern Michigan that serves as a key commuter route connecting Novi and surrounding suburbs to the Detroit metropolitan area.
-
C.
M-20
M-20 is a state trunkline highway in Michigan that runs east–west across the central part of the state, connecting communities such as Midland to the broader regional road network.
-
D.
C.205
C.205 is the Italian Air Force designation for the Macchi C.205 Veltro, a World War II-era single-seat fighter aircraft.
-
E.
M-22
M-22 is a scenic state highway in Michigan renowned for its picturesque route along the Lake Michigan shoreline and through the Leelanau Peninsula near Traverse City.
- 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: MC252 Target entity description: MC252 is the Macondo Prospect offshore oil well in the Gulf of Mexico that was the source of the 2010 Deepwater Horizon oil spill.
-
A.
Mk2
The Mk2 is the second generation of the Volkswagen Golf, a popular compact car produced in the 1980s and early 1990s known for its improved refinement, safety, and performance over its predecessor.
-
B.
M-5
M-5 is a state highway in southeastern Michigan that serves as a key commuter route connecting Novi and surrounding suburbs to the Detroit metropolitan area.
-
C.
M-20
M-20 is a state trunkline highway in Michigan that runs east–west across the central part of the state, connecting communities such as Midland to the broader regional road network.
-
D.
C.205
C.205 is the Italian Air Force designation for the Macchi C.205 Veltro, a World War II-era single-seat fighter aircraft.
-
E.
M-22
M-22 is a scenic state highway in Michigan renowned for its picturesque route along the Lake Michigan shoreline and through the Leelanau Peninsula near Traverse City.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
hydrocarbon reservoir
ⓘ
offshore oil well ⓘ oil field block ⓘ |
| approximateOilSpilled |
4.9 million barrels
ⓘ
about 780 million liters ⓘ |
| associatedCompany |
Cameron International
ⓘ
Halliburton ⓘ Transocean ⓘ |
| associatedDisaster |
Deepwater Horizon oil spill
ⓘ
surface form:
Deepwater Horizon disaster
|
| associatedRig | Deepwater Horizon ⓘ |
| blockNumber | 252 ⓘ |
| blowoutDate | 2010-04-20 ⓘ |
| cappingDate | 2010-07-15 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| discoveryYear | 2009 ⓘ |
| drillingType | deepwater drilling ⓘ |
| environmentalImpact |
damage to marine and coastal ecosystems
ⓘ
extensive pollution of Gulf of Mexico ⓘ |
| event |
Deepwater Horizon oil spill
ⓘ
surface form:
2010 Deepwater Horizon oil spill
|
| explosionDate | 2010-04-20 ⓘ |
| impact | largest marine oil spill in petroleum industry history ⓘ |
| leaseArea | Mississippi Canyon ⓘ |
| leaseholder | BP ⓘ |
| leaseNumber | Mississippi Canyon 252 ⓘ |
| legalCase | United States v. BP Exploration & Production Inc. ⓘ |
| locatedIn |
Gulf of Mexico
ⓘ
Macondo Prospect ⓘ Mississippi Canyon ⓘ
surface form:
Mississippi Canyon Block 252
Outer Continental Shelf ⓘ |
| notable | source of the 2010 Deepwater Horizon oil spill ⓘ |
| operator | BP ⓘ |
| partner |
Anadarko Petroleum
ⓘ
MOEX Offshore 2007 ⓘ |
| region |
U.S. Gulf of Mexico offshore lease area
ⓘ
surface form:
offshore Louisiana
|
| regulator |
Bureau of Ocean Energy Management
ⓘ
surface form:
U.S. Minerals Management Service
|
| reliefWellCompletionDate | 2010-09-19 ⓘ |
| reservoirType | deepwater oil reservoir ⓘ |
| spillEndDate | 2010-07-15 ⓘ |
| spillStartDate | 2010-04-20 ⓘ |
| spillType | subsea blowout ⓘ |
| staticKillDate | 2010-08-03 ⓘ |
| successorRegulator |
Bureau of Ocean Energy Management
ⓘ
Bureau of Safety and Environmental Enforcement ⓘ |
| waterDepth |
approximately 1500 meters
ⓘ
approximately 5000 feet ⓘ |
| wellStatus |
capped
ⓘ
permanently sealed ⓘ |
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: MC252 Description of subject: MC252 is the Macondo Prospect offshore oil well in the Gulf of Mexico that was the source of the 2010 Deepwater Horizon oil spill.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.