About: http://webisa.webdatacommons.org/41523656

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	A number of challenges, including technical difficulties and high costs, as well as infrastructure and policy gaps, have kept many promising fuel-cell technologies in the demonstration phase for decades.
http://www.w3.org/ns/prov#wasQuotedFrom	janecapital.com