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We reasoned that activated NK cells would be more useful for these experiments because ( i ) an encounter in vivo between NK cells that normally traffic in the blood ( 4 ) and iDCs which reside in the tissues ( 1 , 3 ) , should only occur when both cells are activated ; ( ii ) activated NK cells mediate more potent lysis of iDCs ( 11 - 13 ) , thereby allowing for a more rigorous examination of a potential cytotoxic effect ; and ( iii ) the number of NK cells obtained after short - term in vitro culture would be far greater providing more cells for analysis ( 9 ) .
 Anatomy: NK cells; Anatomy: NK cells; Anatomy: blood; Anatomy: iDCs; Anatomy: tissues; Anatomy: cells; Anatomy: NK cells; Anatomy: iDCs; Anatomy: NK cells; Anatomy: cells
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
 Entities: NK cells, NK cells, blood, iDCs, tissues, cells, NK cells, iDCs, NK cells, cells 
Answer:
 Anatomy: NK cells; Anatomy: NK cells; Anatomy: blood; Anatomy: iDCs; Anatomy: tissues; Anatomy: cells; Anatomy: NK cells; Anatomy: iDCs; Anatomy: NK cells; Anatomy: cells