23058
Two obvious advantages of doped QDs , especially doped ZnS QDs , over typical CdSe @ ZnS and CdTe QDs are longer dopant emission lifetime and potentially lower cytotoxicity .
 Chemical: ZnS; Chemical: CdSe; Chemical: ZnS; Chemical: CdTe
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: ZnS; Chemical: CdSe; Chemical: ZnS; Chemical: CdTe