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Return-oriented programming ( also called " chunk-borrowing à la Krahmer " ) is a computer security exploit technique in which the attacker uses control of the call stack to indirectly execute cherry-picked machine instruction s or groups of machine instructions immediately prior to the return instruction in subroutine s within the existing program code , in a way similar to the execution of a threaded code interpreter .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
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