16435
Here , the effect of C60 fullerenes on the accumulation of weathered dichlorodiphenyldichloroethylene ( p , p ' - DDE ; DDT metabolite ) by Cucurbita pepo ( pumpkin ) and Eisenia fetida ( earthworm ) was determined under single and multispecies conditions .
 C60, fullerenes, dichlorodiphenyldichloroethylene, p , p ' - DDE, DDT
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 C60, fullerenes, dichlorodiphenyldichloroethylene, p , p ' - DDE, DDT