<https://www.sportico.com/business/commerce/2017/planet-fitness-using-ai-to-reduce-membership-churn-1759/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.sportico.com/business/commerce/2017/planet-fitness-using-ai-to-reduce-membership-churn-1759/>