Complex sentence: Ascanio Sobrero (October 12 1812--May 26 1888), was the Italian chemist, born in Casale Monferrato, who discovered nitroglycerine in 1847 while working under Théophile-Jules Pelouze at the University of Turin, who had worked with the explosive material guncotton.
Split into simpler sentences: Ascanio Sobrero (October 12 1812--May 26 1888), was the Italian chemist, born in Casale Monferrato, who discovered nitroglycerine in 1847. He was studying under Théophile-Jules Pelouze at the University of Turin, who had worked with the explosive material guncotton.