original question: How many songwriter has the profession of [Pianist]?
answer: 63
answer type: Songwriter.
auxiliary information: A pianist is an individual who plays the piano. Most forms of Western music can make use of the piano. Consequently, pianists have a wide variety of repertoire and styles to choose from, including traditionally classical music, jazz, blues and all sorts of popular music, including rock music. Most pianists can, to a certain extent, play other keyboard-related instruments such as the synthesizer, harpsichord, celesta and the organ.
What number of those who are a [Pianist] are also a songwriter?