About: http://webisa.webdatacommons.org/416460752

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	You can do anything you want beyond that to protect against cross-site scripting or other vulnerabilities. mysql_real_escape_string just focuses on SQL injection.
http://www.w3.org/ns/prov#wasQuotedFrom	tech-evangelist.com