324119
In about 1892 Doble 's grandfather formed The Abner Doble Company assigning his interests to his sons Robert and William , Abner 's father .
 Doble, Abner Doble, Abner
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Doble, Abner Doble, Abner