21685
Corrosion studies on pure Co , Cr , and Mo in protein solutions found material deposition only on Mo .
 Chemical: Co; Chemical: Cr; Chemical: Mo; Chemical: Mo
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: Co; Chemical: Cr; Chemical: Mo; Chemical: Mo