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In this paper , we propose a human action recognition system suitable for embedded computer vision applications in security systems , human-computer interaction and intelligent environments .
 used for: human action recognition system, embedded computer vision applications; used for: embedded computer vision applications, security systems; used for: embedded computer vision applications, human-computer interaction; used for: embedded computer vision applications, intelligent environments; conjunction: security systems, human-computer interaction; conjunction: human-computer interaction, intelligent environments
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:  human action recognition system, embedded computer vision applications; embedded computer vision applications, security systems; embedded computer vision applications, human-computer interaction; embedded computer vision applications, intelligent environments; security systems, human-computer interaction; human-computer interaction, intelligent environments 
Answer:
 used for: human action recognition system, embedded computer vision applications; used for: embedded computer vision applications, security systems; used for: embedded computer vision applications, human-computer interaction; used for: embedded computer vision applications, intelligent environments; conjunction: security systems, human-computer interaction; conjunction: human-computer interaction, intelligent environments