1054
Pipelined Natural Language Generation -LRB- NLG -RRB- systems have grown increasingly complex as architectural modules were added to support language functionalities such as referring expressions , lexical choice , and revision .
 architectural modules, language functionalities; referring expressions, language functionalities; referring expressions, lexical choice; lexical choice, language functionalities; lexical choice, revision; revision, language functionalities
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:
 architectural modules, language functionalities; referring expressions, language functionalities; referring expressions, lexical choice; lexical choice, language functionalities; lexical choice, revision; revision, language functionalities