Complex sentence: His last example is about automated plumbing (which causes a flushing noise be heard in the background) this leads Uncle Orville (who is off stage) to once again remark, "No privacy at all around this place".
Split into simpler sentences: His last example is about automated plumbing (which causes a flushing noise be heard in the background). This leads Uncle Orville (who is off-stage) to once again remark "No privacy at all around this place".