149820
Hijacking On March 19 , 2009 , the Horizon-1 was harassed on its way from Ukraine to China in the Gulf of Aden by Somali pirates as she witnessed the hijacking of the Greek-owned vessel MV Titan .
 Ukraine, China, Somali
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ukraine, China, Somali