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Ecotropic viral integration site - 1 ( Evi - 1 ) is a nuclear transcription factor , which is essential for the proliferation / maintenance of hematopoietic stem cells ( HSCs ) .
 Anatomy: nuclear; Anatomy: hematopoietic stem cells; Anatomy: HSCs
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: nuclear; Anatomy: hematopoietic stem cells; Anatomy: HSCs