A mixed-initiative annotation framework is described herein. A document that includes several sentences is presented to a user, and an extractor module analyzes at least one sentence and automatically extracts a subject, predicate, object triple therefrom. The subject, predicate, object triple is displayed in graphical relation with the sentence as a proposed annotation to the sentence. Graphical options are presented to the user that allow the user to accept the proposed annotation, reject the proposed annotation, or modify the proposed annotation.