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This paper proposes an automatic , essentially domain-independent means of evaluating Spoken Language Systems -LRB- SLS -RRB- which combines software we have developed for that purpose -LRB- the '' Comparator '' -RRB- and a set of specifications for answer expressions -LRB- the '' Common Answer Specification '' , or CAS -RRB- .
 software, domain-independent means of evaluating Spoken Language Systems -LRB- SLS -RRB-; software, specifications; specifications, domain-independent means of evaluating Spoken Language Systems -LRB- SLS -RRB-; specifications, answer expressions
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:
 software, domain-independent means of evaluating Spoken Language Systems -LRB- SLS -RRB-; software, specifications; specifications, domain-independent means of evaluating Spoken Language Systems -LRB- SLS -RRB-; specifications, answer expressions