<https://databricks.com/jp/blog/2021/06/09/how-to-build-a-scalable-wide-and-deep-product-recommender.html#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://databricks.com/jp/blog/2021/06/09/how-to-build-a-scalable-wide-and-deep-product-recommender.html>