PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • While experiments with electric powered craft began in the 1830s (and included the work of such pioneers as Englishman Sir William Grove who was the first to introduce fuel cells as a source of energy on board a boat) it wasn't until the 1890s that electric boats became popular, especially in England where the clean and silent electric craft were often preferred to smoky steam driven boats.
http://www.w3.org/ns/prov#wasQuotedFrom
  • electric-boat-association.org.uk