Task: Question Generation
Input (English): Context : The Ak 5 or Automatkarbin 5 (``automatic carbine 5'', ``automatic carbine'' being the Swedish term for assault rifle) is the Swedish version of the FN FNC assault rifle with certain modifications, mostly to adapt the weapon to the Swedish climate. 
Subject : Ak 5 
Relation : based on
Output (English): Which is the basis of Ak 5?