About: http://webisa.webdatacommons.org/203109400

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	For (3) - I am not an expert in Symfony2 but quick look through the documentation, it does not have any particular tool for you to use in this case, except the support to set if you want your cookie secured or not
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com