question: What opera starring Mary LeSawyer had its premiere in Philadelphia in 1946?
answer: Street Scene
context: Title: Mary LeSawyer
  Passage: Mary LeSawyer (October 8, 1917; Shamokin, Pennsylvania – June 13, 2004; Orlando, Florida) was an American opera singer of Ukrainian descent who had an active international career during the 1940s through the 1960s.  A lyric soprano, LeSawyer studied opera at the Juilliard School before beginning her singing career.  She had a long and fruitful partnership with the New York City Opera from 1949 through 1961.  With the NYCO she appeared in "Carmen", "La Traviata", "Madame Butterfly", and others.  She notably took part in the company's celebrated 1960 national tour, performing in four American operas: ""The Ballad of Baby Doe", "Street Scene", Susannah", and "Six Characters in Search of an Author".
  Title: The Flower Girl
  Passage: The Flower Girl is a North Korean revolutionary genre theatrical performance, which was written by the country's first President Kim Il-sung according to official North Korean sources.  The performance is considered as one of the "Five Great Revolutionary Operas" (Korean: 5대 ), a group of classical, revolution-themed opera repertoires well received within North Korea.  It was also made into a novel.  A film adaption of the opera starring Hong Yong-hee was made in 1972.
  Title: Street Scene (opera)
  Passage: Street Scene is an American opera by Kurt Weill (music), Langston Hughes (lyrics), and Elmer Rice (book).  Written in 1946 and premiered in Philadelphia that year, "Street Scene" is based on the Pulitzer Prize-winning play of the same name by Rice.
citations: Street Scene (opera) Mary LeSawyer