Complex sentence: Poroshenko thanked Kutsyn and stated he became shell-shocked on 2 July 2014 while combating the 2014 insurgency in Donbass; had a concussion and was staying at a hospital.
Split into simpler sentences: Poroshenko thanked Kutsyn and stated he became shell-shocked on 2 July 2014 while combating the 2014 insurgency in Donbass. He had a concussion and was staying at a hospital.