17954
Quantum dots exhibit less bioaccumulation than free cadmium and selenium in the earthworm Eisenia andrei .
 Chemical: cadmium; Chemical: selenium
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: cadmium, selenium 
Answer:
 Chemical: cadmium; Chemical: selenium