In the third category, the reference paper is associated with multiple NIST-ISODB adsorbents (and, usually, multiple CSD entries): we count 330 articles falling in this category, which are associated to 937 CSD entries. For example, the DOI of Ref. 30 is associated with CSD entries DANWOF and DANWUL, and with isotherms in the NIST-ISODB for two MOFs labelled MOF-235 and MOF-236. Since these names are not reported in the CSD metadata, the association between isotherm and CSD entry is lost and could only be recovered by a careful reading of the publication: it would be a substantial effort considered the many CSD structures in this category. Therefore, we decided to discard these ambiguous matches.