Article A mentions a Cu-based catalyst and CH 4 as a product in the abstract, and describes KHCO 3 as the electrolyte in the methodology, it is highly probable that KHCO 3 was employed as the electrolyte for methane production. Our approach also provided valuable insights into product selectivity based on the presence of specific elements in a catalyst. We conducted two types of analyses using different sections of the articles: the abstract and the discussion. In the first, we simply examined positive co-occurrence between catalyst elements and products of CO 2 RR and HER. The result of this analysis is portrayed in Figure cited. Furthermore, we excluded CO as a target product in this analysis. This choice was based on the nature of our corpus, which consists of articles focusing on carbon dioxide and carbon monoxide reduction. Therefore, including CO as a product would introduce a bias towards higher frequencies for element-CO pairs. We conducted a similar analysis for electrolyte-product pairs. These results are shown in Figure .