_:na7c3cc411b3d42919a0a8794ac99717fxb3
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.nsf.org/in/en/knowledge-library/nsf-ansi-51-and-nsf-ansi-61-product-certifications-for-food-and-drinking-wa>