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In this paper , we present a digital signal processor -LRB- DSP -RRB- implementation of real-time statistical voice conversion -LRB- VC -RRB- for silent speech enhancement and electrolaryngeal speech enhancement .
 used for: digital signal processor -LRB- DSP -RRB- implementation, real-time statistical voice conversion -LRB- VC -RRB-; used for: real-time statistical voice conversion -LRB- VC -RRB-, silent speech enhancement; used for: real-time statistical voice conversion -LRB- VC -RRB-, electrolaryngeal speech enhancement; conjunction: silent speech enhancement, electrolaryngeal speech enhancement
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:  digital signal processor -LRB- DSP -RRB- implementation, real-time statistical voice conversion -LRB- VC -RRB-; real-time statistical voice conversion -LRB- VC -RRB-, silent speech enhancement; real-time statistical voice conversion -LRB- VC -RRB-, electrolaryngeal speech enhancement; silent speech enhancement, electrolaryngeal speech enhancement 
Answer:
 used for: digital signal processor -LRB- DSP -RRB- implementation, real-time statistical voice conversion -LRB- VC -RRB-; used for: real-time statistical voice conversion -LRB- VC -RRB-, silent speech enhancement; used for: real-time statistical voice conversion -LRB- VC -RRB-, electrolaryngeal speech enhancement; conjunction: silent speech enhancement, electrolaryngeal speech enhancement