Given a document, is it an original?
This task incorporates external detection and intrinsic detection. External detection is about searching for sources of a suspicious document. Intrinsic detection is about identifying plagiarized passages via breaches of writing style.
Given a Wikipedia edit, is it well-intentioned?
This task is concerned with preventing "any addition, removal, or change of content made in a deliberate attempt to compromise the integrity of Wikipedia," which defines vandalism on Wikipedia. Given a set of edits on Wikipedia articles, the task is to separate the ill-intentioned edits from the well-intentioned edits.