14674
Endothelial cells ( EC ) act as APC for resting PBL in vitro, and may have important roles in vivo in the pathogenesis of allograft rejection and delayed hypersensitivity .
 cell type: resting PBL; cell type: Endothelial cells; cell type: PBL; cell type: EC
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: resting PBL, Endothelial cells, PBL, EC 
Answer:
 cell type: resting PBL; cell type: Endothelial cells; cell type: PBL; cell type: EC