233582
Later in Chapter 5 of his autobiography , the Emperor relates that Abba Samuel was one of the seven men who drowned in a boating accident on Lake Alemaya on 7 June 1915 .
 Abba Samuel
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Abba Samuel