26229
A proteomic approach was employed to investigate arsenic - induced alteration in the zebrafish liver proteome following a 7 - day exposure to 50 ppb sodium arsenite .
 Chemical: arsenic; Chemical: sodium arsenite
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: arsenic, sodium arsenite 
Answer:
 Chemical: arsenic; Chemical: sodium arsenite