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It is celebrated on June 22nd , as it marks the beginning of the uprising of Croatian anti-fascist Partisans against German and Italian occupying forces , that started with the forming of the First Sisak Partisan Detachment on June 22 , 1941 near Sisak , Croatia .
 Partisans, Sisak, Sisak , Croatia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Partisans, Sisak, Sisak , Croatia