14791
The myeloid integrin CD11b is expressed selectively on the surface of mature macrophages , monocytes , neutrophils , and natural killer cells .
 cell type: natural killer cells; protein: myeloid integrin CD11b; cell type: neutrophils; cell type: mature macrophages; cell type: monocytes
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: natural killer cells, myeloid integrin CD11b, neutrophils, mature macrophages, monocytes 
Answer:
 cell type: natural killer cells; protein: myeloid integrin CD11b; cell type: neutrophils; cell type: mature macrophages; cell type: monocytes