Complex sentence: On 16 April 2009, David Haye wore a T-shirt depicting him holding the heads of the Klitschko brothers while standing atop their decapitated bodies, henceforth declaring'war' on both the Klitschko brothers, hoping to first defeat Wladimir, then Vitali.
Split into simpler sentences: On 16 April 2009, David Haye wore a T-shirt depicting him holding the heads of the Klitschko brothers while standing atop their decapitated bodies. At the same time, he declared a war on both the Klitschko brothers, hoping to first defeat Wladimir, then Vitali.