Complex sentence: In June 2011, the mall was host to the British Obstetrics Society's exhibit on antique gynecological implements which features a wide array of speculums, some of which were used in Ancient Rome.
Split into simpler sentences: In June 2011, the mall was host to the British Obstetrics Society's exhibit on antique gynecological implements. The exhibit features a wide array of speculums, some of which were used in Ancient Rome.