Figure 5 from: Stocker M, Heger T, Schweidtmann AM, Ćwiek-Kupczyńska H, Penev L, Dojchinovski M, Willighagen E, Vidal M-E, Turki HA, Balliet D, Tiddi I, Kuhn T, Mietchen D, Karras O, Vogt L, Hellmann S, Jeschke JM, Krajewski P, Auer S (2022) SKG4EOSC - Scholarly Knowledge Graphs for EOSC: Establishing a backbone of knowledge graphs for FAIR Scholarly Information in EOSC. Research Ideas and Outcomes 8: e83789. https://doi.org/10.3897/rio.8.e83789