Complex sentence: Girolamo Lucchesini (May 7,1751-October 20,1825), Prussian diplomatist, was born at Lucca, the eldest son of Marquis Lucchesini.
Split into simpler sentences: Girolamo Lucchesini (May 7,1751--October 20,1825) was a diplomat of the Kingdom of Prussia. Lucchesini was born at Lucca, the eldest son of Marquis Lucchesini.