Complex sentence: The Turkish route meant a pipeline from Azerbaijan would run through Georgia or Armenia, but the route through Armenia was politically impossible due to the unresolved war between Armenia and Azerbaijan over the status of Nagorno-Karabakh.
Split into simpler sentences: The Turkish route meant a pipeline from Azerbaijan running through either Georgia or Armenia. However, the route through Armenia was politically impossible due to the unresolved war between Armenia and Azerbaijan over the status of Nagorno-Karabakh.