12 Importantly, these nine catalysts were also characterized in detail, resulting in more than forty measured properties per material. To this data set, we applied the compressed-sensing symbolic-regression sure-independencescreening-and-sparsifying-operator (SISSO) 13, 14 approach (Fig. ). We thus identified the few most relevant parameters that are correlated, in a possibly complicated way, with the selectivity towards acrylic acid and with catalyst activity. (B) Schematic workflow of the proposed approach combining clean experiments and AI for the identification of "materials genes" of heterogeneous catalysis. Here GHSV means "gas hourly space velocity", and f(id) means "function of interpretable descriptors". The "catalyst preparation" step consists in catalyst synthesis, calcining, pressing and sieving.