25023
Striatal tyrosine hydroxylase ( TH ) , glial fibrilary acidic protein ( GFAP ) , and iron content in ventral midbrain were quantified .
 Chemical: tyrosine; Chemical: iron
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: tyrosine, iron 
Answer:
 Chemical: tyrosine; Chemical: iron