Complex sentence: EMP, in collaboration with SIFF, operates the Science Fiction Fantasy Short Film Festival (SFFSFF), which takes place annually every winter in Seattle, Washington at the world renowned Seattle Cinerama Theater.
Split into simpler sentences: EMP, in collaboration with SIFF, operates the Science Fiction Fantasy Short Film Festival (SFFSFF). SFFSFF takes place annually every winter in Seattle, Washington at the world renowned Seattle Cinerama Theater.