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Sulam is also identified with the biblical village of Shunem , which is said to be of the tribe of Issachar and the place where the Philistines camped before Saul 's last battle , and the native town of Abishag , King David 's concubine , in .
 Issachar, Saul, Abishag, King David
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Issachar, Saul, Abishag, King David