16439
Under single or multispecies conditions , C60 had little impact on DDE bioaccumulation by either species .
 Chemical: C60; Chemical: DDE
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: C60, DDE 
Answer:
 Chemical: C60; Chemical: DDE