181697
Julie is unaware , though , that her sister Kerrie ( Sonja Ball ) is still alive after the terrorist attack and is one of Tyler 's hostages .
 Julie, Sonja Ball
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Julie, Sonja Ball