NUST Alpha at RIRAG 2025: Fusion RAG for Bridging Lexical and Semantic Retrieval and Question Answering Muhammad Rouhan Faisal author Muhammad Abdullah author Faizyaab Ali Shah author Shalina Riaz author Huma Ameer author Seemab Latif author Mehwish Fatima author 2025-01 text Proceedings of the 1st Regulatory NLP Workshop (RegNLP 2025) Tuba Gokhan editor Kexin Wang editor Iryna Gurevych editor Ted Briscoe editor Association for Computational Linguistics Abu Dhabi, UAE conference publication faisal-etal-2025-nust https://aclanthology.org/2025.regnlp-1.12/ 2025-01 79 84