Complex sentence: The relations between Alamgir II and the usurping Vizier, Imad-ul-Mulk, by this time had deteriorated was murdered by Imad-ul-Mulk and the Maratha leader Sadashivrao Bhau.
Split into simpler sentences: The relations between Alamgir II and the usurping Vizier, Imad-ul-Mulk, by this time had deteriorated. He was murdered by Imad-ul-Mulk and the Maratha leader Sadashivrao Bhau.