8068
To validate our method , we compare it with the Maximum Likelihood -LRB- ML -RRB- estimation method under sparse data and with the Expectation Maximization -LRB- EM -RRB- algorithm under incomplete data respectively .
 it, Maximum Likelihood -LRB- ML -RRB- estimation method; it, Expectation Maximization -LRB- EM -RRB- algorithm; sparse data, it; sparse data, Maximum Likelihood -LRB- ML -RRB- estimation method; incomplete data, it; incomplete data, Expectation Maximization -LRB- EM -RRB- algorithm
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:
 it, Maximum Likelihood -LRB- ML -RRB- estimation method; it, Expectation Maximization -LRB- EM -RRB- algorithm; sparse data, it; sparse data, Maximum Likelihood -LRB- ML -RRB- estimation method; incomplete data, it; incomplete data, Expectation Maximization -LRB- EM -RRB- algorithm