Complex sentence: Terry Nation (August 8 1930--March 9 1997) was a Welsh television screenwriter and is probably best known for creating the villainous Daleks for the long-running science fiction television series "Doctor Who".
Split into simpler sentences: Terry Nation (August 8 1930--March 9 1997) was a Welsh television screenwriter. He is probably best known for creating the villainous Daleks in the long-running science fiction television series "Doctor Who".