About: http://webisa.webdatacommons.org/301178163

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	Tizag.com is another good one; though for the most part it is more focused on scripting (a slightly more advanced topic), it also has a solid HTML tutorial and CSS tutorial for beginners.
http://www.w3.org/ns/prov#wasQuotedFrom	graphicdesignforum.com