These publishers were chosen because they are the four primary publishers in the metal-organic framework (MOF)/separations fields but limiting our search to these publishers naturally introduces some bias to our dataset. To identify papers, we queried the term "olefin, MOF" on each search portal. We manually reviewed the returned results to identify articles where it appeared the authors measured at least one isotherm of either acetylene, ethylene, or ethane in a MOF. This process yielded 132 publications across all four publishers. We note that this approach to dataset curation did not yield a complete list of all articles where MOFs were investigated for C2 separation capability, and there are likely relevant papers that were not found through our search. From the relevant publications, we gathered isotherm data and matched with the corresponding MOF structural files. Screenshots of the relevant isotherms were taken from each article and uploaded to WebPlotDigitizer for digitization. We digitized the adsorption curve of the isotherm and also the desorption curve where available, but we only used adsorption data in model training. In total, 949 isotherms were digitized (Figure ). We converted units to a consistent basis for model training, i.e., kPa for pressure and mmol/g for uptake. For each isotherm, we downloaded the associated MOF structure from the Cambridge Crystallographic Data Centre (CCDC) as a Crystallographic Information File (CIF). 51 Percentages in the pie chart on the left refer to the number of publications gathered from each publisher. The table on the right shows how many isotherms were gathered for each adsorbate and how many MOF structures are represented. We note that many publications measured isotherms of the same adsorbate-structure pair across a range of temperatures, so the number of MOFs is less than the number of total isotherms.