A Multimodal Manufacturing Safety Chatbot: Knowledge Base Design, Benchmark Development, and Evaluation of Multiple RAG Approaches. - Ryan Singh; Austin Hamilton; Amanda White; Michael Wise; Ibrahim Yousif; Arthur Carvalho; Zhe Shan; Reza Abrisham Baf; Mohammad Mayyas; Lora A. Cavuoto; Fadel M. Megahed (CoRR, 2025)