About: http://webisa.webdatacommons.org/191507935

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	If you look at interfaces such as Google who also use progressive disclosure they also use a + symbol but they reinforce with a text label, so that the functionality is immediately apparent:
http://www.w3.org/ns/prov#wasQuotedFrom	moodle.org