original question: How many film songs are written in [C major]?
answer: 4
answer type: Film song.
auxiliary information: The C major scale consists of the pitches C, D, E, F, G, A, and B. Its key signature has no flats or sharps. Its relative minor is A minor and its parallel minor is C minor. C major is one of the most common key signatures used in western music. Most transposing instruments playing in their home key are notated in C major; for example, a clarinet in B‚ô≠ sounding a B-flat major scale is notated as playing a C major scale. The white keys of the piano correspond to the C major scale. Among brass instruments, the contra-bass tuba is in C. A pedal harp tuned to C major has all of its pedals in the middle position.
What is the total number of songs in movies that are written in  [C major]?