25901
These findings emphasise a particular caution when interpreting and extrapolating results on the action mechanisms of TCDD obtained in studies using 5L cells as a model system .
 Chemical: TCDD
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: TCDD