799
However , this is not the only area in which the principles of the system might be used , and the aim in building it was simply to demonstrate the workability of the general mechanism , and provide a framework for assessing developments of it .
 system, this
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:
 system, this