Complex sentence: In 2015, the Organization for Security and Co-operation in Europe released an analysis highly critical of disinformation campaigns by Russia employed to appear as legitimate news reporting which were intended to interfere with Ukraine relations with Europe after the removal of former Ukraine president Viktor Yanukovych from power.
Split into simpler sentences: In 2015, the Organization for Security and Co-operation in Europe released an analysis highly critical of disinformation campaigns by Russia employed to appear as legitimate news reporting. These propaganda campaigns by Russia were intended to interfere with Ukraine relations with Europe--after the removal of former Ukraine president Viktor Yanukovych from power.