Complex sentence: Bimal Roy had previously signed on Vyajanthimala and Dilip Kumar for two films, the first film "Devdas" (1955) based on a novel, received much critical acclaim and a National Film Award for Best Feature Film in Hindi.
Split into simpler sentences: Bimal Roy had previously signed on Vyajanthimala and Dilip Kumar for two films. The first, "Devdas" (1955), based on a novel, received much critical acclaim and a National Film Award for Best Feature Film in Hindi.