Complex sentence: The PKK was linked to extortion rackets and drug trafficking in order to raise funds, which resulted in the United States, European Union, NATO, Syria, Australia, Turkey, and many other countries including the PKK on their lists of terrorist organizations.
Split into simpler sentences: The PKK was linked to extortion rackets and drug trafficking in its drive to raise funds. As a result, the United States, European Union, NATO, Syria, Australia, Turkey, and many other countries have included the PKK on their lists of terrorist organizations.