25. A system for processing content, the system comprising: a content data store configured to store a plurality of original items of content, each item of original content comprising audio narration and a plurality of original objects, each original object comprising at least one original attribute; a narration data store comprising one or more audio clips; and a computing device in communication with the content data store and the narration data store, the computing device configured to: select an object from a source graph comprising a plurality of objects, the selected object comprising at least one attribute; access an item of original content; select an original object; and replace, in the item of original content, at least one original attribute of the selected original object with at least one attribute of the object selected from the source graph to form an item of modified content.
26. The system for processing content of claim 25 , wherein the computing device is further configured to: identify, in the audio narration, a recitation of the at least one original attribute of the selected original object; generate, from the one or more audio clips, a recitation of at least one attribute of the object selected from the source graph; and replace, in the audio narration, the recitation of the at least one original attribute of the selected original object with the generated recitation of the at least one attribute of the selected object selected from the source graph to form a modified audio narration.