Complex sentence: He consumed alcoholic drinks on a near-daily basis for long periods in his life, and frequently imbibed before, after, and during mealtimes, although he is not generally considered by historians to have been an alcoholic.
Split into simpler sentences: He consumed alcoholic drinks on a near-daily basis for long periods in his life, and frequently imbibed before, after, and during mealtimes. He is not generally however considered by historians to have been an alcoholic.