Triple

Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).

Phrase: B1 antigen | Statement: [CD20 protein, alternativeName, B1 antigen]

Target entity: B1 antigen
Context triple: [CD20 protein, alternativeName, B1 antigen]

• A. CD46
  CD46 is a human cell-surface complement regulatory protein that also serves as an entry receptor for various pathogens, including certain adenoviruses and measles virus.
• B. HLA
  HLA is the three-letter IATA airport code for Lanseria International Airport, a major privately owned airport serving the Johannesburg region in South Africa.
• C. ABO blood group system
  The ABO blood group system is the primary human blood classification method based on the presence or absence of specific antigens on red blood cells, crucial for safe blood transfusions and organ transplantation.
• D. Blood Type
  "Blood Type" is the critically acclaimed 2018 debut EP by American singer-songwriter Cautious Clay, blending R&B, indie, and electronic influences.
• E. major histocompatibility complex (MHC)
  The major histocompatibility complex (MHC) is a set of cell-surface proteins essential for the immune system to recognize foreign molecules and present antigens to T cells, playing a central role in adaptive immunity and transplant compatibility.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: B1 antigen
Triple: [CD20 protein, alternativeName, B1 antigen]

B1 antigen is a cell-surface molecule found on most B lymphocytes and is widely used as a diagnostic and therapeutic target in B-cell malignancies.

Target entity: B1 antigen
Target entity description: B1 antigen is a cell-surface molecule found on most B lymphocytes and is widely used as a diagnostic and therapeutic target in B-cell malignancies.

• A. CD46
  CD46 is a human cell-surface complement regulatory protein that also serves as an entry receptor for various pathogens, including certain adenoviruses and measles virus.
• B. HLA
  HLA is the three-letter IATA airport code for Lanseria International Airport, a major privately owned airport serving the Johannesburg region in South Africa.
• C. ABO blood group system
  The ABO blood group system is the primary human blood classification method based on the presence or absence of specific antigens on red blood cells, crucial for safe blood transfusions and organ transplantation.
• D. Blood Type
  "Blood Type" is the critically acclaimed 2018 debut EP by American singer-songwriter Cautious Clay, blending R&B, indie, and electronic influences.
• E. major histocompatibility complex (MHC)
  The major histocompatibility complex (MHC) is a set of cell-surface proteins essential for the immune system to recognize foreign molecules and present antigens to T cells, playing a central role in adaptive immunity and transplant compatibility.
• F. None of above. chosen