5787
At a single - cell level , the population expressing higher CD117 levels was able to generate bone - resorbing osteoclasts , phagocytic macrophages , and antigen - presenting dendritic cells in vitro with efficiencies of more than 90 % , indicating that there exists a common developmental pathway for these cell types .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None