51854
In information theory , given an unknown stationary source π with alphabet A , and a sample w from π , the Krichevsky – Trofimov ( KT ) estimator produces an estimate πi ( w ) of the probabilities of each symbol i ∈ A. This estimator is optimal in the sense that it minimizes the worst-case regret asymptotically .
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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: location, person, organization 
Text: {0} 
 Entities:  
Answer:
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