To identify descriptors indicating the catalyst performance in C3oxidation, we use the acrylic acid selectivity (𝑆 EICJ/KI EIKL ) as target property. With the exception of MoVOx, which was only measured at 4 temperatures (vide supra), 9 different temperatures in the range 225-425 ºC are considered per catalyst. Altogether, 76 data points are used. Even though the temperature is offered as a primary feature in our analysis and it can therefore be used to construct the descriptor expression, by using MT-SISSO we are also able to capture the effect of temperature via the coefficients used to fit the models (𝑐 … in Eq. 4). This is because such coefficients are functions of the task, in this case the different temperatures. Indeed, SISSO captures the temperature effect only by the fitted coefficients. The best descriptor expressions identified do not contain the temperature as a parameter (vide infra).