<https://onlinemarketing.de/e-commerce/studie-kaeufer-amazon-gebuendelte-star-ratings-getaeuscht#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://onlinemarketing.de/e-commerce/studie-kaeufer-amazon-gebuendelte-star-ratings-getaeuscht>