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Wessex under Alfred the Great was left as the only surviving English kingdom , and under his successors , it steadily expanded at the expense of the kingdoms of the Danelaw .
 Wessex, Alfred the Great, Danelaw
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Wessex, Alfred the Great, Danelaw