276579
The people of that time consumed and stored wild sorghum , and used ceramic s adorned by complicated paint ed patterns created perhaps by using comb s made from fish bone and which belong to a general pottery tradition strongly associated with the southern parts of the sahara ( e.g. , of the Khartoum mesolithic and various contemporary sites in Chad ) of that period .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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