4026
Experiments with the TREC 2003 and TREC 2004 QA tracks indicate that rankings produced by our metric correlate highly with official rankings , and that POURPRE outperforms direct application of existing metrics .
 TREC 2003 and TREC 2004 QA tracks, metric; TREC 2003 and TREC 2004 QA tracks, POURPRE; TREC 2003 and TREC 2004 QA tracks, metrics; metric, rankings; POURPRE, metrics
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:
 TREC 2003 and TREC 2004 QA tracks, metric; TREC 2003 and TREC 2004 QA tracks, POURPRE; TREC 2003 and TREC 2004 QA tracks, metrics; metric, rankings; POURPRE, metrics