About: http://webisa.webdatacommons.org/272467183

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	The two presidents did speak occasionally on the phone, including after the 2008 election, when Mandela called Obama to congratulate him on his victory.
http://www.w3.org/ns/prov#wasQuotedFrom	staradvertiser.com