Simplify the following text for a Grade 4 native English-speaking person.
Original: Schinz was born at Zurich and studied medicine at WÃ 1\/4 rzburg and Jena , returning to Zurich in 1798 to practice .
Simplified: Schinz was born at Zurich and studied medicine at WÃ 1\/4 rzburg and Jena . In 1798 he returning to Zurich to work as a doctor .