Complex sentence: Alan William Napier-Clavering (7 January 1903--8 August 1988) was an English actor, widely known for portraying Alfred the butler in the 1960s live-action "Batman" television series.
Split into simpler sentences: Alan William Napier-Clavering (7 January 1903--8 August 1988) was an English actor. But Napier finally became widely known for portraying Alfred the butler in the 1960s live-action "Batman" television series.