Complex sentence: The history of Rhymney is described in "Rhymney Memories," a book by Dr Thomas Jones, who was born there and whose daughter, the Labour Party politician Eirene White was later granted the title Baroness White of Rhymney.
Split into simpler sentences: The history of Rhymney is described in "Rhymney Memories," a book by Dr Thomas Jones. Jones was born in the town and his daughter, the Labour Party politician Eirene White, was later granted the title Baroness White of Rhymney.