A Study of Faceted Blog Distillation–PRIS at TREC 2009 Blog Track. - Si Li 001; Huiji Gao; Hao Sun 015; Fei Chen; Oupeng Feng; Sanyuan Gao; Hao Zhang 022; Xinsheng Li; Caili Tan; Weiran Xu; Guang Chen 003; Jun Guo 002 (TREC, 2009)