Assertion: clarinet's key | /r/HasProperty | d major
Facets:
Source sentences:
text: Both the second movements are in the same key (D major) and have similar characters and many similar phrases, although they have different tempo markings.
text: Wolfgang Amadeus Mozart also called for clarinets in B♮ when writing in very sharp keys (e.g. the E major arias in Idomeneo and Così fan tutte), but this became obsolete far sooner.