Subword language model for faster query auto-completion with a retrace algorithm and a reranking method by approximate marginalization - ___[EMNLP-IJCNLP 2019](https://www.emnlp-ijcnlp2019.org/)___ ยท ___[SPNLP @ NAACL 2019](https://structuredprediction.github.io/SPNLP19)___