13731
PMA activated ERK2 kinase in both alveolar macrophages and monocytes ; however, monocytes consistently showed a significantly greater activation of ERK2 kinase by PMA compared with alveolar macrophages .
 cell type: monocytes; cell type: alveolar macrophages; protein: ERK2 kinase; protein: ERK2 kinase; cell type: alveolar 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: monocytes, alveolar macrophages, ERK2 kinase, ERK2 kinase, alveolar macrophages, monocytes 
Answer:
 cell type: monocytes; cell type: alveolar macrophages; protein: ERK2 kinase; protein: ERK2 kinase; cell type: alveolar macrophages; cell type: monocytes