Papers by Alexandros Xenos
Sentiment Analysis of Homeric Text: The 1st Book of Iliad (2022.lrec-1)
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| Challenge: | Sentiment analysis studies focus more on online customer reviews and social media texts, but are less on literary studies. |
| Approach: | They propose to model the perceived sentiment of Iliad verses using a deep learning masked language model and a pre-trained model to estimate the sentiment of the poem. |
| Outcome: | The proposed model shows that sentiment estimators can be used as mechanical annotators, thus facilitating the distant reading of Homeric text. |
From the Detection of Toxic Spans in Online Discussions to the Analysis of Toxic-to-Civil Transfer (2022.acl-long)
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| Challenge: | a dataset of English posts with annotations of toxic spans is released . sequence labeling models perform best, but rationale extraction methods are promising . |
| Approach: | They propose a dataset for toxic spans detection that includes an annotation of toxic posts . they propose to add generic rationale extraction mechanisms to the model to obtain toxic span information . |
| Outcome: | The proposed framework is based on a dataset of English posts with toxic span annotations . it shows that sequence labeling models perform best, but that rationale extraction methods are promising . |
Vision-Free Retrieval: Rethinking Multimodal Search with Textual Scene Descriptions (2025.emnlp-main)
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| Challenge: | Contrastively trained Vision-Language Models exhibit shallow language understanding, manifesting bag-of-words behaviour. |
| Approach: | They propose a vision-free, single-encoder retrieval pipeline to replace traditional text-to-image retrieval paradigm with structured image descriptions. |
| Outcome: | The proposed approach reduces the modality gap and improves compositionality and performance on short and long caption queries. |
A Simple Baseline for Knowledge-Based Visual Question Answering (2023.emnlp-main)
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| Challenge: | Recent studies emphasize the importance of incorporating both explicit and implicit knowledge to answer questions requiring external knowledge. |
| Approach: | They propose a pipeline that incorporates both explicit and implicit knowledge . their method is training-free and does not require access to external databases or APIs . |
| Outcome: | The proposed method achieves state-of-the-art accuracy on OK-VQA and A-OK-VQ datasets. |