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To overcome the singularity problem of the least squares estimate -LRB- LSE -RRB- method , an approximate least squares estimate -LRB- ALSE -RRB- method is proposed to estimate the parameters of the ACGMRF model .
 singularity problem, least squares estimate -LRB- LSE -RRB- method; approximate least squares estimate -LRB- ALSE -RRB- method, parameters of the ACGMRF model
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:
 singularity problem, least squares estimate -LRB- LSE -RRB- method; approximate least squares estimate -LRB- ALSE -RRB- method, parameters of the ACGMRF model