From: alicedj@libero.it   
      
   Hello,   
      
   I'm trying to training an hidden markov model using the forward - backward   
   algorithm (Baum Welch) but I don't understand which input I have to give it.   
   In particular, should I give a complete training set (states + observations)   
   or only the observations?   
      
   thanks!   
   Alessia   
      
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