503
Tandem copies of this enhancer functioned synergistically in mature (Jurkat) T-cell lines as well as resting and activated immature (CCRF-CEM) T-cell lines .
 cell line: mature (Jurkat) T-cell lines; cell line: immature (CCRF-CEM) T-cell lines
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 cell line: mature (Jurkat) T-cell lines; cell line: immature (CCRF-CEM) T-cell lines