13909
In vitro toxicological characterisation of the S - containing arsenic metabolites thio - dimethylarsinic acid and dimethylarsinic glutathione .
 Chemical: S; Chemical: arsenic; Chemical: thio - dimethylarsinic acid; Chemical: dimethylarsinic glutathione
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: S, arsenic, thio - dimethylarsinic acid, dimethylarsinic glutathione 
Answer:
 Chemical: S; Chemical: arsenic; Chemical: thio - dimethylarsinic acid; Chemical: dimethylarsinic glutathione