About: http://webisa.webdatacommons.org/455083516

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	At the bottom of the list there is an option to save a chart as a template.As for not being able to add arbitrary text to charts, that really is a dealbreaker.
http://www.w3.org/ns/prov#wasQuotedFrom	arstechnica.com