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Results showed , although supplement of Nanocid to conventional diet had no effect on performance but addition of Nanocid to diet containing 3 ppm aflatoxin increased significantly the cumulative BWG , cumulative feed consumption and decreased FCR in the last 2 weeks of experimental period .
 Chemical: aflatoxin
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: aflatoxin 
Answer:
 Chemical: aflatoxin