Triplr (verb): a service that generates RDF Triples from URIs
It is not an HTML Tidy or a TagSoup cleaner or a semantic Houdini pulling knowledge out of thin air.
The content at the original URIs must be readable as one of the syntaxes Raptor knows - RDF ones, RSS, Atom, Microformats that have a GRDDL profile and so on. The full list is given in How... can I use it?