Question: Untitled 2 is a jazz rap song by American rapper Kendrick Lamar featured on a compilation album that was released on?

Context paragraphs:
Alright (Kendrick Lamar song): "Alright" is a song by American rapper Kendrick Lamar, taken from his third album "To Pimp a Butterfly" (2015).  Lyrically a festive song about hope, it features uncredited vocals from the song's co-producer Pharrell Williams during the chorus.  "Alright" was released to radio stations as the album's fourth single on June 30, 2015.  Most music publications considered it among the best songs and videos of the year, highlighting their message in the social context of the time.  "Alright" received four nominations at the 58th Grammy Awards: Song of the Year, Best Music Video, Best Rap Performance and Best Rap Song, winning the latter two.

Untitled Unmastered: Untitled Unmastered (stylized as untitled unmastered.)  is a extended play by American rapper Kendrick Lamar.  It was released on March 4, 2016, by Top Dawg Entertainment, Aftermath Entertainment and Interscope Records.  It consists of previously unreleased demos that originated during the recording of Lamar's album "To Pimp a Butterfly" (2015), continuing that work's exploration of politically-charged and psychological themes, as well as its experimentation with free jazz, soul, avant-garde, and funk styles.  The compilation album received widespread acclaim from critics, and it debuted atop the US "Billboard" 200.

Untitled 02 – 06.23.2014.: "untitled 02 | 06.23.2014."  is a song by American rapper Kendrick Lamar, featured on his compilation album, "Untitled Unmastered".  The song was produced by Cardo and Yung Exclusive.

Untitled 07 – 2014 - 2016: "Untitled 07 | 2014 - 2016" (stylized untitled 07 | 2014 - 2016), single version titled "untitled 07 | levitate", is a song by American hip hop recording artist Kendrick Lamar, taken from his 2016 compilation album, "untitled unmastered. ".  On March 23, 2016, "untitled 07 | levitate" was released separately on the iTunes Store as the compilation's lead single.

Freedom (Beyoncé song): "Freedom" is a song recorded by American singer Beyoncé featuring American rapper Kendrick Lamar for her sixth studio album, "Lemonade" (2016).  The song was written by Jonny Coffer, Beyoncé, Carla Marie Williams, Dean McIntosh and Kendrick Lamar; it contains samples of "Let Me Try", written by Frank Tirado, performed by Kaleidoscope; samples of "Collection Speech/Unidentified Lining Hymn", recorded by Alan Lomax in 1959, performed by Reverend R.C. Crenshaw; and samples of "Stewball", recorded by Alan Lomax and John Lomax, Sr. in 1947, performed by Prisoner "22" at Mississippi State Penitentiary at Parchman.  Its production was handled by Beyoncé, Coffer and veteran hip hop record producer Just Blaze.

I (Kendrick Lamar song): "i" is a song by American rapper Kendrick Lamar.  It was released on September 23, 2014 as the lead single from Lamar's third studio album "To Pimp a Butterfly".  The song utilizes music from "That Lady", written by and originally performed by R&B group The Isley Brothers, elements from which were re-recorded rather than being directly sampled from the original record.  "i" won two awards at the 2015 Grammy Awards: Best Rap Performance and Best Rap Song.

Untitled 03 – 05.28.2013.: "Untitled 03 | 05.28.2013." , (stylized "untitled 03 | 05.28.2013.") , titled "Untitled 1" before its official release, is a song by American rapper Kendrick Lamar, featured on his compilation album, "untitled unmastered. "

These Walls (Kendrick Lamar song): "These Walls" is a song by American rapper Kendrick Lamar.  It was released on October 13, 2015, as the fifth and final single from his third album, "To Pimp a Butterfly" (2015).  The track was written by Kendrick Lamar, Terrace Martin, Larrance Dopson, James Fauntleroy and Rose McKinney.  It won Best Rap/Sung Collaboration at the 58th Grammy Awards.

Untitled 08 – 09.06.2014.: "Untitled 08 | 09.06.2014."  (stylized untitled 08 | 09.06.2014.) , titled "Untitled 2" before its official release, is a jazz rap song by American rapper Kendrick Lamar, featured on his compilation album, "untitled unmastered. ".

Kendrick Lamar discography: American rapper Kendrick Lamar has released four studio albums, one compilation album, one extended play (EP), five mixtapes, 43 singles (including 30 as a featured artist), three promotional singles and 55 music videos. Lamar initially performed under the stage name K-Dot, releasing three mixtapes under the moniker: "Y.N.I.C. (Hub City Threat: Minor of the Year)" (2005), "Training Day" (2007) and "C4" (2009).  He gained major attention after the release of his fourth mixtape "Overly Dedicated", which was released in 2010.  It was Lamar's first full-length project to be released under his birth name and fared well enough to enter the United States "Billboard" Top R&B/Hip-Hop Albums chart, where it peaked at number 72.

Supporting paragraphs: Untitled 08 – 09.06.2014. Untitled Unmastered
Answer: March 4, 2016