Complex sentence: According to recent estimates, the Sahel region as a whole registered a grain surplus of 85,000 tonnes, but Niger and Chad suffered grain deficits of around 224,000 and 217,000 tonnes, respectively.
Split into simpler sentences: According to recent estimates, the Sahel region as a whole registered a grain surplus of 85,000 tonnes. However, Niger and Chad suffered grain deficits of around 224,000 and 217,000 tonnes, respectively.