19607
The modulation of zinc homeostasis led to the evaluation of the effect of combined cobalt and zinc exposure .
 Chemical: zinc; Chemical: cobalt; Chemical: zinc
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: zinc; Chemical: cobalt; Chemical: zinc