About: http://webisa.webdatacommons.org/41380264

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	Apparently all charts except the Area chart provide a non-plotted point for an empty cell in the data range, though we can spoil that by selecting the option to treat a gap as a zero value.
http://www.w3.org/ns/prov#wasQuotedFrom	peltiertech.com