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Fas ( APO - 1 / CD95 ) is a type I membrane protein that is capable of initiating an apoptosis signaling pathway when bound to its ligand ( FasL ) .
 Anatomy: membrane
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: membrane