807
The assay represents the physiological change in Langerhans cell ( LC ) behavior after exposure to a sensitizing chemical , resulting in LC migration from the epidermis to the dermis .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None