Complex sentence: Born into a noble family of Arezzo, Perelli was encouraged by his father to study law at the University of Pisa, but Guido Grandi (1671--1742), an abbot who was teaching mathematics there, steered him toward science.
Split into simpler sentences: Born into a noble family of Arezzo, Perelli was encouraged by his father to study law at the University of Pisa. But Guido Grandi (1671-1742), an abbot who was teaching mathematics there, steered him toward science.