Complex sentence: He then trained under the architect Pierre Contant d'Ivry, where he met Jean-Michel Chevotet, these two master architects were to give Ledoux introductions to their affluent clientele.
Split into simpler sentences: He then trained under Pierre Contant d'Ivry, where he met Jean-Michel Chevotet. The two master architects were to give Ledoux introductions to their affluent clientele.