Let users create versions of articles
A simple solution might be to something like Rules, and Rules Link. 

Create a rule that clones the data from one node into a new node. Have it actioned to happen when a certain link/button is clicked (hence, Rules Link). The last set of actions in the rule would be to set an entity reference back to the original node (or set a common taxonomy term)

Otherwise, create a small custom module that basically does the same thing. mapping fields onto each other and creating a new node. You'll have more control on what happens with the data but its not easy if you are not a developer.