Complex sentence: In a good year, a bottle will only begin to show its true qualities after a decade or two of cellaring and, with proper care, will keep for a century or more, gradually adding layers of taste and hitherto undetected fruity overtones.
Split into simpler sentences: In a good year, a bottle will only begin to show its true qualities after a decade or two of cellaring. With proper care, a bottle will keep for a century or more, gradually adding layers of taste and fruity overtones.