Train Naive Based Classifier
Done: MLE is a somewhat abstractly defined concept, but in
essence it is your best guess at a parameter. In this case we assume
that the observed frequency is your best guess. 
You want to calculate the probabilty of your observation (HasOutdoorSeating=0 in this case), given
IsGoodRestaurant=1. That probability is not 0 (check the first sample for instance)