The network was expanded with the names of the compounds and enzymes, and with a chemical structure identifier, which was obtained with the SPARQL query as depicted in Code Example 8. This query retrieves the Wikidata identifier of each metabolite, which has the property "instance of" (p:/ps:P31) or subclass of (p:/ps:P279) connected to the item "chemical compound" (wd:Q11173), "ion" (Q36496), "chemical substance" (Q79529), "pair of enantiomers" (Q55662747), with a UNION-query (part 3). Furthermore, the structural identifiers are retrieved with an optional statement, since these identifiers can be absent from the item (part 4). The name is retrieved in the English language with the filter statement (part 5). The resulting file is further processed by removing the URL in front of the Wikidata identifiers, to be able to connect the identifier directly in Cytoscape with the calculated subnetwork. When chemical entries in Wikidata were not tagged as either chemical compound, substance, ion, or pair of enantiomers, the name was retrieved manually. In a similar fashion, the protein names can be added to the network using their Ensembl identifier.