According to current United States copyright, copyright owners have the exclusive right "to prepare derivative works based upon copyrighted work." A derivative work is any work, including fanfiction, based upon one or more preexisting works. In the case where a copyright owner chooses to exercise their exclusive right to prepare derivative works against a work of fanfiction, they can sue the fanfiction writer for copyright infringement. To prove infringement, an owner must present evidence establishing that the accused has copied protected elements of the original work. If proven, possible infringement remedies include an order to cease sharing and/or to destroy the work (known as an injunction), or monetary damages. The remedy is dependent on the harm done to the copyright owner, the intent of the infringing person, and the grievousness of the infringement. An example of injunction as remedy was seen in the case of "Anderson v. Stallone". There, Sylvester Stallone successfully pursued an action for copyright infringement against Anderson, an author who wrote a proposed script for "Rocky IV," by proving that the copyright-protected characters used in the previous "Rocky" movies were central to the new script. The court enjoined Anderson from pursuing the creation of a movie or other published work based on his script.