Using the SPARQL endpoint (Figure ), SPARQL queries were used to extract data from the RDF. In total, the generated RDF consists of 6,355,652 triples. Based on the 21 scientific papers, 87 unique ERMs were identified and included in the RDF, although 4 of these were micro or macro materials and were therefore excluded for the analyses in the rest of this paper. The ENMs were annotated according to their type using terms from the NPO, ChEBI, and eNM ontologies, resulting in a total of 35 types of ENMs. This number was obtained with the SPARQL query "Count-material-types.rq" from the example query panel. For the annotations, NPO was used 29% of the time, ChEBI 23%, and eNM 49%. The most reported ENMs in the selected literature include multi-walled carbon nanotubes, silver nanoparticles, and titanium dioxide nanoparticles (see Figure ) that were reported by 6, 5 and 4 papers, respectively.