Complex sentence: William Hallowes Miller FRS (6 April 1801--20 May 1880), British mineralogist and crystallographer, was born at Velindre near Llandovery, Carmarthenshire.
Split into simpler sentences: William Hallowes Miller FRS (6 April 1801--20 May 1880), British mineralogist and crystallographer. Miller was born in 1801 at Velindre near Llandovery, Carmarthenshire.