If the task is to create, the task can be accomplished through collection, contest, or collaboration. Collection is useful when the task can be divided into small activities that can be done relatively independently of each other. YouTube and Flickr are examples of collections, as YouTubers and photographers upload videos independently of each other. A contest is useful when only a few good outcomes are needed, like for instance in the Threadless t-shirt contests. A collaboration should be used when the task cannot be divided into independent pieces, and the dependency among the pieces can be managed well. All Wikipedia articles, for instance, are collaborative.