7243
In vivo expanded CD4+CD28null and CD8+CD28null T cells uniformly lack alpha- and beta- bound complexes , resembling the pattern seen in chronically activated cells and not of senescent cells .
 cell type: senescent cells; cell type: chronically activated cells
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: senescent cells, chronically activated cells 
Answer:
 cell type: senescent cells; cell type: chronically activated cells