4851
Primary neuron cultures were divided into four groups due to ACM , which were neurons without ACM exposure ( group I ) and neurons exposed to ACM from 0 , 5 or 10 mu M arsenite treated astrocytes ( group II - IV ) .
 Chemical: arsenite
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: arsenite