Complex sentence: One of the projects he was involved with was organizing the Powell Street Festival, and he edited a film titled "The First 100 Years" which was based upon a slide show, and designed to teach children about Japanese Canadian history.
Split into simpler sentences: One of the projects he was involved with was organizing the Powell Street Festival. He also edited a film titled "The First 100 Years" which was based upon a slide show, and designed to teach children about Japanese Canadian history.