Complex sentence: Schigolch arrives and asks for a breath (he is asthmatic) before she leaves Alwa offers the Countess a lot of money to cover her expenses but she refuses, she leaves with Schigolch.
Split into simpler sentences: Schigolch arrives and asks for a breath (he is asthmatic). Before she leaves, Alwa offers the Countess money to cover her expenses but she refuses, and leaves with Schigolch.