Complex sentence: The Mistral in France is a cold, strong, and usually dry wind, usually occurring in the winter and spring, blowing from the northwest or north of Europe through the valley of the Rhône River to the Mediterranean.
Split into simpler sentences: The Mistral in France is a fresh or cold, often violent, and usually dry wind, blowing throughout the year but is most frequent in winter and spring. It blows from the northwest or north of Europe through the valley of the Rhône River to the Mediterranean.