10523
It is found that the BolA - like dual ligands system exhibits significantly enhanced gene expression in both HeLa and 293T cell lines , as compared with poly ( ethylenimine ) PEI .
 Chemical: poly ( ethylenimine ); Chemical: PEI
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: poly ( ethylenimine ); Chemical: PEI