14. The method of claim 1 , wherein identifying a secondary portion of natural language content that references the natural language content comprises: extracting one or more features from the primary portion of natural language content; and performing a search of a corpus of information for one or more secondary portions of natural language content that reference at least one of the one or more features from the primary portion of natural language content or reference the primary portion of natural language content as a whole.
14. The method of claim 1 , wherein identifying a secondary portion of natural language content that references the natural language content comprises: extracting one or more features from the primary portion of natural language content; and performing a search of a corpus of information for one or more secondary portions of natural language content that reference at least one of the one or more features from the primary portion of natural language content or reference the primary portion of natural language content as a whole. 15. The method of claim 14 , wherein identifying a secondary portion of natural language content that references the natural language content further comprises analyzing the one or more secondary portions of natural language content to identify at least one of direct quotes from the primary portion of natural language content present in the one or more secondary portions of natural language content or explicit links to the primary portion of natural language content.