Challenge: Existing approaches to process contexts with unlimited length are limited to finite expansion length or prone to performance degradation when dealing with very long contexts.
Approach: They propose to exploit fragment-level relations in external memory to hierarchically process the long text.
Outcome: The proposed model improves story understanding, repository-level code generation, and long-term chatting.

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Challenge: Existing studies have focused on extending the context length of large language models (LLMs) due to their quadratic computational complexity and a lack of high-quality long training examples, most LLMs are trained with a limited window size.
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Dynamic Chunking and Selection for Reading Comprehension of Ultra-Long Context in Large Language Models (2025.acl-long)

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Challenge: Current methods for improving large language models rely on splitting long contexts into fixed-length chunks, compromising accuracy.
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How Do Large Language Models Capture the Ever-changing World Knowledge? A Review of Recent Advances (2023.emnlp-main)

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Challenge: Large language models (LLMs) are impressive in solving tasks, but they can quickly be outdated after deployment.
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Flexibly Utilize Memory for Long-Term Conversation via a Fragment-then-Compose Framework (2025.emnlp-main)

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Challenge: Large language models extract useful information from conversation history to enhance the response in long-term conversations.
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Semi-automatic Data Enhancement for Document-Level Relation Extraction with Distant Supervision from Large Language Models (2023.emnlp-main)

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Challenge: Document-level Relation Extraction (DocRE) is a task that aims to extract relations from a long context.
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Out-of-Context Reasoning in Large Language Models (2025.findings-emnlp)

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Challenge: a lightweight technique trains only new token embeddings on axioms and evaluates them on unseen tasks.
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Evaluating Very Long-Term Conversational Memory of LLM Agents (2024.acl-long)

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Challenge: Existing studies on long-term open-domain dialogues focus on evaluating responses within contexts spanning no more than five chat sessions.
Approach: They propose a machine-human pipeline to generate very long-term dialogues by leveraging LLMs and retrieval augmented generation techniques.
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EpMAN: Episodic Memory AttentioN for Generalizing to Longer Contexts (2025.acl-long)

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Challenge: Recent advances in Large Language Models (LLMs) have yielded impressive successes on many language tasks, but efficient processing of long contexts remains a significant challenge.
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SEGMENT+: Long Text Processing with Short-Context Language Models (2024.emnlp-main)

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Challenge: Existing frameworks that increase context window do not guarantee robust performance across long input tasks.
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LlmLink: Dual LLMs for Dynamic Entity Linking on Long Narratives with Collaborative Memorisation and Prompt Optimisation (2025.coling-main)

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Challenge: Existing methods focus on supervised fine-tuning or limited to one-off prediction, which poses a challenge where the context is long.
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