1270
Fluorescein diacetate staining and P - gp mRNA level illustrated the hepatocytes ' polarity in the biochips .
 Chemical: Fluorescein diacetate
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: Fluorescein diacetate 
Answer:
 Chemical: Fluorescein diacetate