Question: Where was Summertime sang by Abbie Mitchell? 

Context paragraphs:
Abbie Mitchell: Abriea "Abbie" Mitchell Cook (25 September 1884 – 16 March 1960), also billed as Abbey Mitchell, was an American soprano opera singer who sang the role of "Clara" in the premier production of George Gershwin's "Porgy and Bess" in 1935, and was also the first to record "Summertime" from that musical.

Leona Mitchell: Leona Mitchell (born October 13, 1949, Enid, Oklahoma), is an American operatic soprano and an Oklahoma Music Hall of Fame inductee.  She is also a Grammy Award-winning soprano who sang for 18 seasons as a leading spinto soprano at the Metropolitan Opera in New York.

Abbie Carrington: Abbie Beeson Carrington Lewys (June 13, 1856 – April 8, 1925) was one of America's leading coloratura sopranos of the 19th century.  When the Grand Opera House opened in Oshkosh, Wisconsin, for the first time on August 11, 1883, Carrington sang the title role in The Bohemian Girl.

Wayne Mitchell (singer): Wayne Mitchell was a Southern Gospel singer for The King's Servants and sang with The Kingdom Heirs from (1981–1987).  He is now the pilot of a Bonanza G-35 and is involved in the development of an airpark in Blaine, Tennessee called Landing at River’s Edge.  Landing at River’s Edge is a 177 acre gated residential airpark community featuring a 3000' runway, golf course and river frontage.

Emeline Michel: Emeline Michel, born in Gonaïves, is a Haitian singer who has been called "The Joni Mitchell of Haiti."  Her songs merge native Haitian compas and rara music with jazz, pop, bossa nova, and samba.  She's a well accomplished dancer, versatile vocalist, songwriter and producer.  She sang a version of Jimmy Cliff's Many Rivers to Cross at .

Summertime (George Gershwin song): "Summertime" is an aria composed in 1934 by George Gershwin for the 1935 opera "Porgy and Bess".  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.

Shine (Mary Black album): Shine was a 1997 Mary Black album, where she abandons her usual sound and production.  Then album was recorded in Los Angeles, California, United States, with a combination of local session musicians and members of her Irish band.  On production was Larry Klein (who had worked with Peter Gabriel and Joni Mitchell), and he aided in selecting songs from a new crop of songwriters.  Most notably, Mary Black sang five songs written by David Gray.

Little Caesar (Kiss song): "Little Caesar" is a song by the American hard rock band Kiss, featured on their 1989 album "Hot in the Shade".  It is the lone original song that drummer Eric Carr sang lead on during his tenure with Kiss (although he did sing lead on a remake of "Beth" on Kiss's "Smashes, Thrashes & Hits" album the year before).  The song was written by Carr, Gene Simmons and Adam Mitchell.

The Song They Sang... When Rome Fell: The Song They Sang... When Rome Fell is the 2002 debut release by Vermont-based American singer-songwriter Anais Mitchell.  The album was made during the singer's 6-month stay in Austin, Texas, and was recorded in a single afternoon.  It consists of Mitchell playing her acoustic guitar and singing with sparse production.

Supporting paragraphs: Abbie Mitchell Summertime (George Gershwin song)
Answer: opera