Margaret Pierce
E866692
Margaret Pierce is a fictional cardiothoracic surgeon character from the television series "Grey's Anatomy," known as Meredith Grey's half-sister.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Margaret Pierce canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8528260 — 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: Margaret Pierce Context triple: [Maggie Pierce, fullName, Margaret Pierce]
-
A.
Margaret Davenport
Margaret Davenport is the mother of American actor Emile Hirsch.
-
B.
Margaret Whitmore
Margaret Whitmore is best known as the wife of American physician-turned-thriller novelist Robin Cook.
-
C.
Margaret Whigham
Margaret Whigham, later known as Margaret, Duchess of Argyll, was a prominent British socialite whose glamorous lifestyle and highly publicized divorce scandal made her one of the most notorious figures of mid-20th-century high society.
-
D.
Margaret Metcalfe
Margaret Metcalfe was the mother of famed English comic actor and filmmaker Stan Laurel, one half of the legendary comedy duo Laurel and Hardy.
-
E.
Margaret Livingston
Margaret Livingston was an American silent film actress best known for her vamp role opposite George O’Brien and Janet Gaynor in F.W. Murnau’s classic film "Sunrise: A Song of Two Humans."
- 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: Margaret Pierce Target entity description: Margaret Pierce is a fictional cardiothoracic surgeon character from the television series "Grey's Anatomy," known as Meredith Grey's half-sister.
-
A.
Margaret Davenport
Margaret Davenport is the mother of American actor Emile Hirsch.
-
B.
Margaret Whitmore
Margaret Whitmore is best known as the wife of American physician-turned-thriller novelist Robin Cook.
-
C.
Margaret Whigham
Margaret Whigham, later known as Margaret, Duchess of Argyll, was a prominent British socialite whose glamorous lifestyle and highly publicized divorce scandal made her one of the most notorious figures of mid-20th-century high society.
-
D.
Margaret Metcalfe
Margaret Metcalfe was the mother of famed English comic actor and filmmaker Stan Laurel, one half of the legendary comedy duo Laurel and Hardy.
-
E.
Margaret Livingston
Margaret Livingston was an American silent film actress best known for her vamp role opposite George O’Brien and Janet Gaynor in F.W. Murnau’s classic film "Sunrise: A Song of Two Humans."
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
fictional character
ⓘ
television character ⓘ |
| alsoKnownAs | Maggie Pierce ⓘ |
| appearsIn |
Grey's Anatomy
ⓘ
linked to:
Grey’s Anatomy
|
| countryOfOriginOfWork |
United States
ⓘ
linked to:
United States of America
|
| creator | Shonda Rhimes ⓘ |
| employer | Grey Sloan Memorial Hospital ⓘ |
| familyName | Pierce ⓘ |
| fictionalRole | Head of Cardiothoracic Surgery ⓘ |
| fictionalUniverse |
Grey's Anatomy
ⓘ
linked to:
Grey’s Anatomy
|
| firstAppearanceIn |
Grey's Anatomy season 10
ⓘ
linked to:
Grey’s Anatomy
|
| fullName | Margaret Pierce ⓘ |
| gender | female ⓘ |
| genre | medical drama character ⓘ |
| givenName | Margaret ⓘ |
| hasLoveInterest |
Andrew DeLuca
ⓘ
Jackson Avery ⓘ |
| hasProfessionRank | attending surgeon ⓘ |
| hasSkill |
cardiac surgery
ⓘ
surgical leadership ⓘ thoracic surgery ⓘ |
| hasStorylineElement |
family secret revelation
ⓘ
professional rivalry ⓘ romantic relationships at work ⓘ |
| languageOfWork | English ⓘ |
| medium | television ⓘ |
| nationality | American (fictional) ⓘ |
| network | American Broadcasting Company ⓘ |
| occupation |
cardiothoracic surgeon
ⓘ
doctor ⓘ physician ⓘ |
| partOf |
Grey's Anatomy main cast (later seasons)
ⓘ
linked to:
Grey’s Anatomy
|
| personalityTrait |
driven
ⓘ
intelligent ⓘ socially awkward ⓘ |
| portrayedBy | Kelly McCreary ⓘ |
| relative |
Ellis Grey
ⓘ
Meredith Grey ⓘ Richard Webber ⓘ |
| relativeType |
daughter of Ellis Grey
ⓘ
daughter of Richard Webber ⓘ half-sister of Meredith Grey ⓘ |
| seriesRegularFrom |
Grey's Anatomy season 11
ⓘ
linked to:
Grey’s Anatomy
|
| specialty | cardiothoracic surgery ⓘ |
| worksAt | Grey Sloan Memorial Hospital ⓘ |
| worksWith |
Alex Karev
ⓘ
Amelia Shepherd ⓘ Meredith Grey ⓘ Miranda Bailey ⓘ |
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: Margaret Pierce Description of subject: Margaret Pierce is a fictional cardiothoracic surgeon character from the television series "Grey's Anatomy," known as Meredith Grey's half-sister.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.