8865
RF was used to identify the metabolites that caused selenium changes in people with MS by building a correlation model between these metabolites and serum levels of selenium .
 Chemical: selenium; Chemical: selenium
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: selenium, selenium 
Answer:
 Chemical: selenium; Chemical: selenium