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Recently Artificial Neural Network ( ANN ) approaches , in particular methods based on Self - Organising Maps ( SOMs ) , have been reported performing more accurately and providing more consistent results than traditional clustering algorithms in various data - mining problems .
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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:  
Answer:
 None