Challenge: Large language models exhibit the _”lost in the middle” phenomenon when they are unevenly attending to different parts of the provided context.
Approach: They propose principled content selection as a way to increase source coverage . they use determinantal point processes to prioritize diverse content .
Outcome: The proposed method improves source coverage on the DiverseSumm benchmark.

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Tell me what I need to know: Exploring LLM-based (Personalized) Abstractive Multi-Source Meeting Summarization (2024.emnlp-industry)

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Challenge: Existing methods for meeting summarization rely on transcripts and generate generic summaries, failing to contextualize long discussions and to tailor information to individual preferences and productivity requirements.
Approach: They propose a multi-source approach that considers supplementary materials and generates a summary from this enriched transcript.
Outcome: The proposed model increases summary relevance by 9% and produces more content-rich outputs.
A New Approach to Overgenerating and Scoring Abstractive Summaries (2021.naacl-main)

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Challenge: Abstractive summarization is a learning objective to produce system outputs that resemble reference summaries on a word-to-word basis.
Approach: They propose a two-staged strategy to generate multiple variants of the target summary and score and select admissible ones according to users’ needs.
Outcome: The proposed approach can achieve state-of-the-art on benchmark summarization datasets.
Focus Attention: Promoting Faithfulness and Diversity in Summarization (2021.acl-long)

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Challenge: Currently, document summarization is challenging even for humans.
Approach: They propose a focus attention mechanism which encourages decoders to generate tokens that are topically similar to the input document.
Outcome: The proposed method outperforms top-k and nucleus sampling methods on the BBC extreme summarization task and is more accurate than focus attention-based models.
Content Selection in Deep Learning Models of Summarization (D18-1)

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Challenge: Using deep learning models, we find that word embedding does not improve performance over simpler models.
Approach: They propose to use sentence embedding to perform content selection across multiple domains . they propose to propose two alternative models that use auto-regressive sentence extraction .
Outcome: The proposed models improve performance across news, personal stories, meetings, and medical articles.
What Matters to an LLM? Behavioral and Computational Evidences from Summarization (2026.findings-eacl)

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Challenge: Large Language Models (LLMs) are increasingly entrusted with the management of information.
Approach: They combine behavioral and computational analyses to find out what LLMs prioritize . they generate length-controlled summaries and derive empirical importance distributions .
Outcome: The proposed model converges on consistent importance patterns and clusters more by family than by size.
Multi-Document Summarization with Determinantal Point Processes and Contextualized Representations (D19-54)

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Challenge: Determinantal point processes (DPP) is one of the best performing techniques for extractive summarization.
Approach: They propose to combine determinantal point processes with surface indicators for effective identification of summary-worthy sentences.
Outcome: The determinantal point processes (DPP) framework is one of the best performing in summarization competitions.
Learning to Control Summaries with Score Ranking (2026.findings-acl)

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Challenge: Recent advances in summarization focus on improving summary quality across multiple dimensions, but they overlook the challenge of controlling summary generation with respect to individual dimensions.
Approach: They propose a loss function that aligns model outputs with fine-grained, model-based evaluation scores to enable both improvement in summary quality and dimension-specific control.
Outcome: The proposed method improves the overall quality of summaries while maintaining strong control over individual quality dimensions.
Enhancing LLM Knowledge Learning through Generalization (2025.findings-emnlp)

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Challenge: Continued pre-training on paraphrased data has shown empirical promise for enhancing knowledge acquisition, but this approach is costly and unreliable as it relies on external models or manual effort for rewriting.
Approach: They propose formatting-based data augmentation which diversifies documents conveying the same knowledge by altering document formats rather than their content.
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How Far Can We Extract Diverse Perspectives from Large Language Models? (2024.emnlp-main)

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Challenge: Recent advances of large language models have gained much interest from researchers to exploit their capability of creative generation for data augmentation with less cost and higher diversity.
Approach: They propose a criteria-based prompting technique to extract maximum diversity from LLMs.
Outcome: The proposed method extracts diverse opinions from large language models iteratively.
A Guide To Effectively Leveraging LLMs for Low-Resource Text Summarization: Data Augmentation and Semi-supervised Approaches (2025.findings-naacl)

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Challenge: Existing approaches for low-resource text summarization use large language models (LLMs) but such models suffer from inconsistent outputs and are difficult to adapt to domain-specific data.
Approach: They propose two methods to effectively utilize large language models for low-resource text summarization.
Outcome: The proposed methods synthesize high-quality documents using LLaMA-3-70b-Instruct model . they achieve competitive ROUGE scores as a fully supervised method with 5% of the labeled data.

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