Update README.md

README.md

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 Inspired by the demonstration of creative problem-solving in the story of *Columbus' Egg*, this repository presents a benchmark of multiple-choice rebus puzzles. These are designed to challenge the lateral thinking skills of visual question answering (VQA) models. 
 
-[**💻 Code**](https://github.com/koen-47/COLUMBUS) | [**📓 Notebooks**](https://github.com/koen-47/COLUMBUS/tree/main/notebooks) | [**🌐 Website**](https://columbus-vqa.github.io/)
+[**📄 Paper**](https://arxiv.org/pdf/2409.04053) | [**📚 arXiv**](https://arxiv.org/abs/2409.04053) | [**💻 Code**](https://github.com/koen-47/COLUMBUS) | [**📓 Notebooks**](https://github.com/koen-47/COLUMBUS/tree/main/notebooks) | [**🌐 Website**](https://columbus-vqa.github.io/)
 
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