Complex sentence: Sergius IV died on 12 May 1012 and was buried in the Archbasilica of St. John Lateran, and although not canonized is sometimes venerated as a saint by the Benedictines of which he was a member.
Split into simpler sentences: Sergius IV died on 12 May 1012 and was buried in the Basilica of St. John Lateran. Although not canonized, Sergius IV is sometimes venerated as a saint by the Benedictines of which he was a member.