Original sentence: As a result of the 2014 Crimean crisis, the accompanying Russian military intervention and the Crimean status referendum, 2014, the sovereignty over the peninsula is currently disputed between Ukraine and the Russian Federation
Edited sentence: As a result of the 2014 Crimean crisis, the accompanying Russian military intervention (as claimed by Western politicians and media) and the Crimean status referendum, 2014, the sovereignty over the peninsula is currently disputed between Ukraine and the Russian Federation