Complex sentence: Count Vincenzo Dandolo (1758--1819), Italian chemist and agriculturist, was born at Venice of good family, though not of the same house as the famous doges, and began his career as a physician.
Split into simpler sentences: Count Vincenzo Dandolo (1758--1819) was an Italian chemist and agriculturist. He was born in Venice of good family, though not of the same house as the famous doges, and began his career as a physician.