Complex sentence: However the development of writing systems, and their partial supplantation of traditional oral systems of communication, have been sporadic, uneven and slowvides a persistent record of information expressed in a language, which can be retrieved at a future date.
Split into simpler sentences: However the development of writing systems, and their partial supplantation of traditional oral systems of communication, have been sporadic, uneven and slow. A great benefit of writing is that it provides a persistent record of information expressed in a language, which can be retrieved at a future date.