7943
We also investigated the effects of copper ions on THP - mediated NF - L modification .
 Chemical: copper; Chemical: THP
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: copper, THP 
Answer:
 Chemical: copper; Chemical: THP