29658
Overall , the cytotoxicity response of the cells to PPF was demonstrated to be similar to the cytotoxic response of cells to known noncytotoxic materials ( HDPE ) .
 Chemical: PPF
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: PPF