9543
It was discovered recently , that exploiting the sparsity of sources in an appropriate representation according to some signal dictionary , dramatically improves the quality of separation .
 used for: signal dictionary, sparsity of sources; evaluate for: quality of separation, sparsity of sources
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:  signal dictionary, sparsity of sources; quality of separation, sparsity of sources 
Answer:
 used for: signal dictionary, sparsity of sources; evaluate for: quality of separation, sparsity of sources