While overall performance appears degraded, we have inspected the element-wise MAE for the elements that, before the aggregation, had the lowest and highest occurrences in the training set of A. We indeed observed an increase in training instances and sporadic improvements in MAE for the less populated element classes. However, this is often found in correspondence with a noticeable degradation of performance for highly populated elements. This partially explains the previously observed results, as these points weigh much more in the overall MAE. Moreover, as we enrich certain chemical regions, we eventually saturate other chemical elements which eventually coexist within the same chemical formula.