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However , the current best serial algorithm by Boykov and Kolmogorov -LSB- 4 -RSB- -LRB- called the BK algorithm -RRB- still has the superior empirical performance .
 hyponym of: BK algorithm, serial algorithm
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 hyponym of: BK algorithm, serial algorithm