About: http://webisa.webdatacommons.org/254466513

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Just do a quick search on you tube and you will see there are very many examples of people producing their own hydrogen and hh0 at home with very simple circuits.
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org