In addition, in all four models, the non-metallic monolayers graphene, boron nitride and silicon carbide have relatively low prediction errors. GaSe, TaS 2 , and boron nitride also have some of the lowest prediction errors in the four models. The factors in Figure may contribute to the accuracy of the bilayer properties predictions (such as in the case of underrepresented or over-represented monolayers). However, the trends of errors displayed in Figure show that the accuracy of the models is relatively independent these factors.