This report presents the participation of RSLFW team at the NTCIR-18 FairWeb-2 task.We implemented several different retrieval methods to generate five runs using BM25, ColBERT and PM-2 algorithm.In addition to the runs submitted, the results are analyzed through comparison with the official baseline and FairWeb-1 reproduction (revived) runs.
Ishikawa et al. (Fri,) studied this question.