Complex sentence: At one stage, Babar and Tarique met Ershad and finally, they both brought Ershad to Khaleda Zia at her cantonment residence while Ershad joined 4 Party Alliance for second time.
Split into simpler sentences: At one stage, Babar and Tarique met Ershad. Finally, they both brought Ershad to Khaleda Zia at her cantonment residence while JP joined 4 Party Alliance for second time.