11006
This is the first report indicating the antigenotoxic activities of MEP against several mutagen agents such as N - methyl - N ' - nitro - N - nitrosoguanidine , acridin and aflatoxin .
 Chemical: N - methyl - N ' - nitro - N - nitrosoguanidine; Chemical: acridin; Chemical: aflatoxin
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: N - methyl - N ' - nitro - N - nitrosoguanidine; Chemical: acridin; Chemical: aflatoxin