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In this paper , blood pressure figures have been linked to the levels of Fe , Ca , Mg , Zn , Cu , Na and K in hair .
 Chemical: Fe; Chemical: Ca; Chemical: Mg; Chemical: Zn; Chemical: Cu; Chemical: Na; Chemical: K
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: Fe; Chemical: Ca; Chemical: Mg; Chemical: Zn; Chemical: Cu; Chemical: Na; Chemical: K