47948
Toxic equivalence factor ( TEF ) expresses the toxicity of dioxins , furans and PCBs in terms of the most toxic form of dioxin , 2,3,7,8-TCDD .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None