Complex sentence: Giraudoux was an inspiration to Anouilh and, with the encouragement of the acclaimed playwright, he began writing again in 1929, making his theatrical debut in in 1929 with "Humulus le muet", a collaborative project with Jean Aurenche.
Split into simpler sentences: Giraudoux was an inspiration to Anouilh and, with the encouragement of the acclaimed playwright, he began writing again in 1929. Before the end of the year he made his theatrical debut with "Humulus le muet", a collaborative project with Jean Aurenche.