11890
** '' Kingdom of Northumbria '' ' – Osberht ( 849–862 / 863 )
 Kingdom of Northumbria, Osberht
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kingdom of Northumbria, Osberht