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Attila gathered his vassals - Gepids , Ostrogoths , Rugians , Scirians , Heruls , Thuringians , Alans , Burgundians , among others–and began his march west. In 451 , he arrived in Belgica with an army exaggerated by Jordanes to half a million strong .
 Attila, Heruls, Belgica, Jordanes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Attila, Heruls, Belgica, Jordanes