Papers by Martin Josifoski
Invariant Language Modeling (2022.emnlp-main)
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Maxime Peyrard, Sarvjeet Ghotra, Martin Josifoski, Vidhan Agarwal, Barun Patra, Dean Carignan, Emre Kiciman, Saurabh Tiwary, Robert West
| Challenge: | Existing methods to remove spurious correlations and biases involve expensive domain alignment. |
| Approach: | They propose a framework for learning invariant representations that generalize better across environments . they adapt a game-theoretic implementation of IRM to language models . |
| Outcome: | The proposed framework can remove structured noise, ignore correlations and achieve better generalization across environments. |
Exploiting Asymmetry for Synthetic Training Data Generation: SynthIE and the Case of Information Extraction (2023.emnlp-main)
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| Challenge: | Large language models (LLMs) have great potential for synthetic data generation. |
| Approach: | They show that large language models can generate useful data even for complex tasks . they use a symmetric task difficulty asymmetry to prompt an LLM to generate plausible input text for a target output structure. |
| Outcome: | The proposed approach outperforms existing models by a substantial margin on closed information extraction tasks with 1.8M data points and 770M parameters. |
GenIE: Generative Information Extraction (2022.naacl-main)
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| Challenge: | Existing approaches to open information extraction only work with unrealistically small numbers of entities and relations. |
| Approach: | They propose to use a transformer encoder-decoder model to extract triplets from unstructured text . they use 'generative information extraction' to generate triplet representations of information . |
| Outcome: | The proposed model is state-of-the-art on closed information extraction and generalizes from fewer training data points than baselines. |
A Glitch in the Matrix? Locating and Detecting Language Model Grounding with Fakepedia (2024.acl-long)
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Giovanni Monea, Maxime Peyrard, Martin Josifoski, Vishrav Chaudhary, Jason Eisner, Emre Kiciman, Hamid Palangi, Barun Patra, Robert West
| Challenge: | Large language models (LLMs) have an impressive ability to draw on novel information supplied in their context, yet the mechanisms underlying contextual grounding remain unknown. |
| Approach: | They propose a method to study grounding abilities using a counterfactual dataset constructed to clash with a model's parametric knowledge using Fakepedia. |
| Outcome: | The proposed method evaluates grounding abilities when the internal parametric knowledge clashes with the contextual information. |
Grammar-Constrained Decoding for Structured NLP Tasks without Finetuning (2023.emnlp-main)
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| Challenge: | Existing grammar-constrained decoding methods are limited to specific tasks . a grammar constraint is used to control the generation of LMs, but it is limited to a few tasks a task is not performed. |
| Approach: | They propose grammar-constrained decoding to control the generation of large language models . they demonstrate that grammars can describe the output space for a wider range of tasks . |
| Outcome: | The proposed grammars outperform unconstrained models on information extraction, entity disambiguation, and constituency parsing. |
Language Model Decoding as Likelihood–Utility Alignment (2023.findings-eacl)
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Martin Josifoski, Maxime Peyrard, Frano Rajič, Jiheng Wei, Debjit Paul, Valentin Hartmann, Barun Patra, Vishrav Chaudhary, Emre Kiciman, Boi Faltings
| Challenge: | Existing studies only compare decoding algorithms in narrow scenarios, and their findings do not generalize across tasks. |
| Approach: | They propose a taxonomy of misalignment mitigation strategies to provide a unifying view of decoding as a tool for alignment. |
| Outcome: | The proposed taxonomy combines likelihood and utility assumptions to provide general statements about decoding as a tool for alignment across tasks. |
Scalable Zero-shot Entity Linking with Dense Entity Retrieval (2020.emnlp-main)
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| Challenge: | Existing methods for entity linking use manually curated mention tables and incoming Wikipedia link popularity. |
| Approach: | They propose a BERT-based entity linking model with a bi-encoder that embeds the mention context and the entity descriptions and then re-ranked the candidate with . they also evaluate the accuracy-speed trade-off inherent to large pre-trained models. |
| Outcome: | The proposed model is state-of-the-art on recent zero-shot benchmarks and established non-zero-shot evaluations. |
Sketch-Guided Constrained Decoding for Boosting Blackbox Large Language Models without Logit Access (2024.acl-short)
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| Challenge: | Constrained decoding is a technique for enforcing constraints on language model outputs. |
| Approach: | They propose a technique for enforcing constraints on language model outputs . they propose auxiliary model that refines the initial output without constraints . |
| Outcome: | The proposed approach is able to refine the output of an unconstrained blackbox LLM without access to logits. |