Complex sentence: Sponsz did not appear in this episode, but Castafiore does mention that the press once reported wrongly that they were engaged, which is strange since, in "The Calculus Affair", Sponsz had mentioned his wife in conversation with Castafiore.
Split into simpler sentences: Sponsz did not appear in this episode, but Castafiore does mention that the press once reported wrongly that they were engaged. This is strange since in "The Calculus Affair", Sponsz had mentioned his wife in conversation with Castafiore.