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A novel cluster tree enforces sequential tracking in local segments of the sequence while allowing global non-sequential traversal among these segments .
 cluster tree, sequential tracking in local segments; cluster tree, global non-sequential traversal
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:
 cluster tree, sequential tracking in local segments; cluster tree, global non-sequential traversal