With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Summertime (George Gershwin song) was composed by George Gershwin for a musical.
text_B: `` Summertime '' is an aria composed in 1934 by George Gershwin for the 1935 opera Porgy and Bess .. George Gershwin. George Gershwin. aria. aria. opera. opera. Porgy and Bess. Porgy and Bess. Porgy. Porgy ( novel ). The lyrics are by DuBose Heyward , the author of the novel Porgy on which the opera was based , although the song is also co-credited to Ira Gershwin by ASCAP .. song. song. opera. opera. DuBose Heyward. DuBose Heyward. Porgy. Porgy ( novel ). Ira Gershwin. Ira Gershwin. ASCAP. American Society of Composers, Authors and Publishers. The song soon became a popular and much recorded jazz standard , described as `` without doubt ... one of the finest songs the composer ever wrote ... Gershwin 's highly evocative writing brilliantly mixes elements of jazz and the song styles of blacks in the southeast United States from the early twentieth century '' .. song. song. jazz standard. jazz standard. Composer and lyricist Stephen Sondheim has characterized Heyward 's lyrics for `` Summertime '' and `` My Man 's Gone Now '' as `` the best lyrics in the musical theater '' .. Stephen Sondheim. Stephen Sondheim. The song is recognized as one of the most covered songs in the history of recorded music , with more than 33,000 covers by groups and solo performers .. song. song. covered. cover version
related.