Complex sentence: The area once was home to the largest cinema screen in London, the Odeon marble arch. Originally over 75 feet wide, the Odeon showcased 70 mm films in a large circle and stalls auditorium.
Split into simpler sentences: The area once was home to the largest cinema screen in London in the Odeon Marble Arch. The screen was originally over 75 feet wide. The Odeon showcased 70 mm films in a large circle and stalls auditorium.