Assertion: clarinet's note | /r/HasProperty | written as c. a player of a b♭ clarinet
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Source sentences:
text: The instrument's key tells which pitch will sound when the player plays a note written as C. A player of a B♭ clarinet who reads a written C will sound a B♭ while the player of an A clarinet will read the same note and sound an A. The non-transposing member of the family is thus called a "clarinet in C".