<https://8bitsumo.com/wp-content/uploads/2021/08/What-database-is-used-to-build-blockchain.png>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/ImageObject>
<https://8bitsumo.com/what-database-is-used-to-build-blockchain/>