Complex sentence: The boundary of the eastern Languedoc is disputed with the Southern Rhône Valley with the Costières de Nîmes AOC producing Syrah and Grenache base wines that are similar to Côtes du Rhône wine.
Split into simpler sentences: The boundary of the eastern Languedoc with the Southern Rhône Valley is disputed. The Costières de Nîmes AOC produce Syrah and Grenache base wines similar to Côtes du Rhône wine.