Assertion: bass clarinet's range | /r/HasProperty | a basset clarinet
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Source sentences:
text: (His Clarinet Concerto in A Major, KV 622, however, appears originally to have been written for a clarinet with an extended lower range, a basset clarinet in A, though there is an earlier version of part of the first movement, KV 621b in the Köchel catalogue of Mozart's works, scored for G basset horn and pitched a major second lower, in the key of G major.)