Two-Level Transformer and Auxiliary Coherence Modeling for Improved Text
Segmentation
- URL: http://arxiv.org/abs/2001.00891v1
- Date: Fri, 3 Jan 2020 17:06:41 GMT
- Title: Two-Level Transformer and Auxiliary Coherence Modeling for Improved Text
Segmentation
- Authors: Goran Glava\v{s} and Swapna Somasundaran
- Abstract summary: We introduce a novel supervised model for text segmentation with simple but explicit coherence modeling.
Our model -- a neural architecture consisting of two hierarchically connected Transformer networks -- is a multi-task learning model that couples the sentence-level segmentation objective with the coherence objective that differentiates correct sequences of sentences from corrupt ones.
- Score: 9.416757363901295
- License: http://creativecommons.org/licenses/by-nc-sa/4.0/
- Abstract: Breaking down the structure of long texts into semantically coherent segments
makes the texts more readable and supports downstream applications like
summarization and retrieval. Starting from an apparent link between text
coherence and segmentation, we introduce a novel supervised model for text
segmentation with simple but explicit coherence modeling. Our model -- a neural
architecture consisting of two hierarchically connected Transformer networks --
is a multi-task learning model that couples the sentence-level segmentation
objective with the coherence objective that differentiates correct sequences of
sentences from corrupt ones. The proposed model, dubbed Coherence-Aware Text
Segmentation (CATS), yields state-of-the-art segmentation performance on a
collection of benchmark datasets. Furthermore, by coupling CATS with
cross-lingual word embeddings, we demonstrate its effectiveness in zero-shot
language transfer: it can successfully segment texts in languages unseen in
training.
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