Complex sentence: George Johnstone Stoney (15 February 1826--5 July 1911) was a physicist, a native of Ireland, and of the Anglo-Irish Ascendancy, most famous for introducing the term "electron" as the "fundamental unit quantity of electricity".
Split into simpler sentences: George Johnstone Stoney (15 February 1826--5 July 1911) was a physicist, a native of Ireland, and of the Anglo-Irish Ascendancy. He is most famous for introducing the term "electron" as the "fundamental unit quantity of electricity".