Complex sentence: Desmond Wilkinson Llewelyn (12 September 1914--19 December 1999) was a Welsh actor, famous for having played Q in 17 of the "James Bond" films between 1963 and 1999.
Split into simpler sentences: Desmond Wilkinson Llewelyn (12 September 1914--19 December 1999) was a Welsh actor. He played Q in 17 of the "James Bond" films between 1963 and 1999.