Complex sentence: Henry Lewis was born on 21 Agust 1889 at Clydach in the Swansea Valley, an industrial valley which had retained its Welshness, and he was an exceptionally able scholar at school in Ystalfera and later in the University of Wales, Cardiff.
Split into simpler sentences: Henry Lewis was born on 21 Agust 1889 at Clydach in the Swansea Valley. An industrial valley which had retained its Welshness and he was an exceptionally able scholar at school in Ystalfera and later in the University of Wales, Cardiff.