Original sentence: In 2010 Kharkiv Agreements were ratified by both sides (Russian and Ukrainian), which extended the lease for addition 25 with optional five year extension if necessary.The agreements were also part of the Russia–Ukraine gas disputes which sprang out onto the international scale.Ukraine also exclusively leased until 2017 part of territory of Sevastopol municipality to the Russian Black Sea Fleet for its transition outside of Ukraine to Novorossiysk
Edited sentence: In 2010 scandalous Kharkiv Agreements were ratified by both sides (Russian and Ukrainian), which extended the lease for addition 25 with optional five year extension if necessary.The agreements were also part of the famous Russia–Ukraine gas disputes which sprang out onto the international scale.Ukraine also exclusively leased until 2017 part of territory of Sevastopol municipality to the Russian Black Sea Fleet for its transition outside of Ukraine to Novorossiysk, which contradicts the Constitution of Ukraine