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Contrary to existing greedy techniques , these tasks are posed in the form of a discrete global optimization problem with a well defined objective function .
 greedy techniques, tasks; discrete global optimization problem, tasks; well defined objective function, discrete global optimization problem
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 greedy techniques, tasks; discrete global optimization problem, tasks; well defined objective function, discrete global optimization problem