3279
In addition , fluorine analogs of DCPA and DCA were investigated to determine the relative role of chlorine substituents on T - cell immunotoxicity .
 Chemical: fluorine; Chemical: DCPA; Chemical: DCA; Chemical: chlorine
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: fluorine; Chemical: DCPA; Chemical: DCA; Chemical: chlorine