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Finally , serum - free conditioned medium from MDA - 231 cells inhibited the NK cell activity of human blood lymphocytes .
 Anatomy: serum; Anatomy: MDA - 231 cells; Anatomy: NK cell; Anatomy: blood lymphocytes
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: serum, MDA - 231 cells, NK cell, blood lymphocytes 
Answer:
 Anatomy: serum; Anatomy: MDA - 231 cells; Anatomy: NK cell; Anatomy: blood lymphocytes