Assertion: trombone's place | /r/HasProperty | important
Facets:
Source sentences:
text: In the 20th century the trombone maintained its important place in the orchestra in works by Béla Bartók, Alban Berg, Leonard Bernstein, Benjamin Britten, Aaron Copland, Edward Elgar, George Gershwin, Gustav Holst, Leos Janacek, Gustav Mahler, Olivier Messiaen, Darius Milhaud, Carl Nielsen, Sergei Prokofiev, Sergei Rachmaninoff, Maurice Ravel, Ottorino Respighi, Arnold Schoenberg, Dmitri Shostakovich, Jean Sibelius, Richard Strauss, Igor Stravinsky, Ralph Vaughan Williams, Heitor Villa-Lobos, and William Walton.