8173
He responded to William of Septimania 's requests of assistance in his struggle against Charles the Bald 's nominations .
 William of Septimania, Charles the Bald
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 William of Septimania, Charles the Bald