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For solving this problem a novel optimization scheme , called Priority-BP , is proposed which carries two very important extensions over standard belief propagation -LRB- BP -RRB- : '' priority-based message scheduling '' and '' dynamic label pruning '' .
 used for: optimization scheme, problem; hyponym of: Priority-BP, optimization scheme; part of: extensions, optimization scheme; used for: belief propagation -LRB- BP -RRB-, extensions; hyponym of: priority-based message scheduling, extensions; conjunction: priority-based message scheduling, dynamic label pruning; hyponym of: dynamic label pruning, extensions
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
 Entity Pairs:  optimization scheme, problem; Priority-BP, optimization scheme; extensions, optimization scheme; belief propagation -LRB- BP -RRB-, extensions; priority-based message scheduling, extensions; priority-based message scheduling, dynamic label pruning; dynamic label pruning, extensions 
Answer:
 used for: optimization scheme, problem; hyponym of: Priority-BP, optimization scheme; part of: extensions, optimization scheme; used for: belief propagation -LRB- BP -RRB-, extensions; hyponym of: priority-based message scheduling, extensions; conjunction: priority-based message scheduling, dynamic label pruning; hyponym of: dynamic label pruning, extensions