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We investigate the verbal and nonverbal means for grounding , and propose a design for embodied conversational agents that relies on both kinds of signals to establish common ground in human-computer interaction .
 used for: verbal and nonverbal means, grounding; used for: design, embodied conversational agents; used for: common ground, human-computer interaction
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 used for: verbal and nonverbal means, grounding; used for: design, embodied conversational agents; used for: common ground, human-computer interaction