Original sentence: Synthpop was a broad subgenre that saw groups such as The Human League, Depeche Mode, A-ha, Orchestral Manoeuvres in the Dark, Alphaville , and the  Pet Shop Boys chart
Edited sentence: Synthpop was a broad subgenre that saw groups such as The Human League, Depeche Mode, a-ha, Orchestral Manoeuvres in the Dark, Alphaville , and the  Pet Shop Boys chart