Enhanced-LLM extraction of CTI from unstructured threat reports. A tough nut to crack or a walk in the park? - Konstantina Psarrou; Panagiotis Bountakas; Dimitris Eleutheriou; Rafail A. Ellinitakis; Konstantinos Fysarakis; Alexios Lekidis; George Spanoudakis (Future Gener. Comput. Syst., 2026)