Complex sentence: Frank Cellier (23 February 1884--27 September 1948) was an English actor who appeared in West End theatre and later, during the 1930s and 1940s, in films.
Split into simpler sentences: Frank Cellier (23 February 1884--27 September 1948) was an English actor. Later, during the 1930s and 1940s, he also appeared in films.