Negative log-likelihood (NLL) loss for the MDN model trained on mass and radius inputs only and for the MDN model trained on mass, radius, and WMF inputs. (a) Dependence of the NLL loss on the size of the training data set for the two MDN models. (b) Learning curve of the MDN trained on mass and radius inputs only for both the training and validation data sets. (c) Learning curve of the MDN trained on mass, radius, and WMF inputs for both the training and validation data sets.