 Complete the following phrase:  Often regarded as one of the greatest filmmakers of world cinema, Ray made his directorial debut in 1955 with Pather Panchali. The film earned critical acclaim and was awarded under the Best Film category at various award ceremonies and film festivals, including the 3rd National Film Awards 1955, 7th Berlin International Film Festival 1957, and 1st San Francisco International Film Festival 1957. Pather Panchali was also awarded the Prix du document humain prize at the 