What is the fine-grained topic of the following text: Confirmed attendees include Frank McGarvey (manager), Simon Donnelly (captain), Mark Wilson, Craig Beattie and Massimo Donati and local Scottish Lightweight Champion Boxer Calvin McCord is a guest for the Celtic side with Derek Johnstone (manager), Charlie Miller (captain), Bob Malcolm, Alex Rae and Marvin Andrews and Stevenston Tap End’s Grado is a guest for the Rangers side. Only return the topic.
Guest list for a Celtic versus Rangers event