@inproceedings{learningtominequerysubtopicsfromquery,
  title = {Learning to Mine Query Subtopics from Query Log},
  author = {Zhenzhong Zhang and Le Sun and Xianpei Han},
  year = {2015},
  booktitle = {IJCNLP 2015 7},
  url = {https://aclanthology.org/P15-2056},
}