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A judicial source said today , Friday , that five Croatians were arrested last Tuesday during an operation targeting a number of war criminals suspected of involvement in the killing of around 50 Serbian civilians in 1991 .
 geographical social political: Serbian; person: A judicial source; person: five Croatians; person: a number of war criminals suspected of involvement in the killing of around 50 Serbian civilians in 1991; person: around 50 Serbian civilians
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 geographical social political: Serbian; person: A judicial source; person: five Croatians; person: a number of war criminals suspected of involvement in the killing of around 50 Serbian civilians in 1991; person: around 50 Serbian civilians