58147
He blamed Hamas for the kidnapping and murder of three Israeli teenagers in June 2014 , and launched a massive search and arrest operation on the West Bank , targeting members of Hamas in particular , and over the following weeks hit 60 targets in Gaza .
 Hamas, West Bank, Hamas, Gaza
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hamas, West Bank, Hamas, Gaza