Kwuo ihe ị ga-aza n'ajụjụ a dị mgbagwoju anya: Gịnị bụ aha onye na-agụ egwú bụ́ onye Denmark nke nwụrụ na 1931 ma bụrụ onye dere String Quartet No. 4 na F isi ma ọ bụ Quartet maka violin abụọ, viol na cello na F isi, Opus 44?
Carl August Nielsen