sentences:  United Nations Security Council Resolution 231
  
  United Nations Security Council Resolution 231, adopted unanimously on December 15, 1966, after reaffirming previous resolutions on the topic, the Council extended the stationing in Cyprus of the United Nations Peacekeeping Force in Cyprus for an additional 6 months, ending on June 26, 1967.The Council also called upon the parties directly concerned to continue to act with the utmost restraint and to co-operate fully with the peacekeeping force.