Controllable Summarization with Constrained Markov Decision Process
- URL: http://arxiv.org/abs/2108.03405v1
- Date: Sat, 7 Aug 2021 09:12:53 GMT
- Title: Controllable Summarization with Constrained Markov Decision Process
- Authors: Hou Pong Chan, Lu Wang, Irwin King
- Abstract summary: We study controllable text summarization which allows users to gain control on a particular attribute.
We propose a novel training framework based on Constrained Markov Decision Process (CMDP)
Our framework can be applied to control important attributes of summarization, including length, covered entities, and abstractiveness.
- Score: 50.04321779376415
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: We study controllable text summarization which allows users to gain control
on a particular attribute (e.g., length limit) of the generated summaries. In
this work, we propose a novel training framework based on Constrained Markov
Decision Process (CMDP), which conveniently includes a reward function along
with a set of constraints, to facilitate better summarization control. The
reward function encourages the generation to resemble the human-written
reference, while the constraints are used to explicitly prevent the generated
summaries from violating user-imposed requirements. Our framework can be
applied to control important attributes of summarization, including length,
covered entities, and abstractiveness, as we devise specific constraints for
each of these aspects. Extensive experiments on popular benchmarks show that
our CMDP framework helps generate informative summaries while complying with a
given attribute's requirement.
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