Complex sentence: She made her last film appearance in the 1967 film "Raat Aur Din" for which she won a National Film Award for Best Actress, the first actress to win in this category.
Split into simpler sentences: She made her last film appearance in the 1967 film "Raat Aur Din". For this role she won a National Film Award for Best Actress, the first actress to win in this category.