Code Example 3 depicts the properties retrieved with the second subquery: first, identifiers of the source and target metabolite were retrieved, which were needed to con- nect the results from this query to the previous query. Second, pathway and disease ontology (part 2) were retrieved. Third, if a pathway is part of the Reactome collection (part 3). Last, if there were literature references (either for the pathway, the reaction, or the source or target metabolite) (part 4).