5747
Unlike evaluations in the SRE series , the i-vector challenge was run entirely online and used fixed-length feature vectors projected into a low-dimensional space -LRB- i-vectors -RRB- rather than audio recordings .
 fixed-length feature vectors, low-dimensional space -LRB- i-vectors -RRB-; low-dimensional space -LRB- i-vectors -RRB-, i-vector challenge; audio recordings, low-dimensional space -LRB- i-vectors -RRB-
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:
 fixed-length feature vectors, low-dimensional space -LRB- i-vectors -RRB-; low-dimensional space -LRB- i-vectors -RRB-, i-vector challenge; audio recordings, low-dimensional space -LRB- i-vectors -RRB-