Complex sentence: One of her main features will be the Carnival Seaside Theatre--a 12-foot high by 22-foot wide LED screen located by the pool on the Lido deck, which will be used to show movies, sporting events, and concerts.
Split into simpler sentences: One of her main features will be the Carnival Seaside Theatre--a 12-foot high by 22-foot wide LED screen located by the pool on the Lido deck. It is used to show movies, sporting events, and concerts.