Prediction for data set Yindex[default=0].
        This predicts the output mean and variance for the dataset given in Ylist[Yindex]

def predict(self, Xnew, full_cov=False, Y_metadata=None, kern=None, Yindex=0):
        """
        Prediction for data set Yindex[default=0].
        This predicts the output mean and variance for the dataset given in Ylist[Yindex]
        """
        b = self.bgplvms[Yindex]
        self.posterior = b.posterior
        self.kern = b.kern
        self.likelihood = b.likelihood
        return super(MRD, self).predict(Xnew, full_cov, Y_metadata, kern)