8655
Several hypotheses associate magnesium with depression because of the presence of this mineral in several enzymes , hormones , and neurotransmitters , which may play a key role in the pathological pathways of depression .
 Chemical: magnesium
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: magnesium 
Answer:
 Chemical: magnesium