Hierarchical Topic Structuring: From Dense Segmentation to Topically Focused Fragments via Burst Analysis Anca-Roxana Simon author Pascale Sébillot author Guillaume Gravier author 2015-09 text Proceedings of the International Conference Recent Advances in Natural Language Processing Ruslan Mitkov editor Galia Angelova editor Kalina Bontcheva editor INCOMA Ltd. Shoumen, BULGARIA Hissar, Bulgaria conference publication simon-etal-2015-hierarchical https://aclanthology.org/R15-1076/ 2015-09 588 595