Task: Text Simplification
Input (English): Like many composers in this period , he started his musical career as a chorister , although the exact location of his education is unknown : Mons , a town near Saint-Ghislain that had at least two churches with competent music schools , has been suggested .
Output (English): Like many composers in this period , he started to learn about music by singing in a church choir , quite possibly in Saint-Ghislain and then in Mons .