Question: Ty Dolla Sign appeared on the 2014 album Ohio belonging to which American rapper? 

Context articles: Dark Sky Paradise
Ty Dolla Sign
Ty Dolla Sign discography
Drop That Kitty
DJ Dahi
Ohio (Stalley album)
Campaign (mixtape)
My Krazy Life
Free TC
Saved (Ty Dolla Sign song)

Dark Sky Paradise is the third studio album by American rapper Big Sean.
 It was released on February 24, 2015, by GOOD Music and Def Jam Recordings.
 The album features guest appearances from Kanye West, Drake, Ariana Grande, Chris Brown, Ty Dolla Sign, Jhené Aiko, PartyNextDoor, Lil Wayne, John Legend and E-40, while the production was handled by a variety of collaborators, including Key Wane, DJ Mustard, DJ Dahi and Kanye West, who also serves as the album's executive producer alongside Big Sean himself.
 The album was supported by five singles: "I Don't Fuck with You" featuring E-40, "Paradise", "Blessings" featuring Drake, "One Man Can Change the World" featuring Kanye West and John Legend, and "Play No Games" featuring Chris Brown and Ty Dolla Sign.
Tyrone William Griffin Jr. (born April 13, 1985), known professionally as Ty Dolla Sign (stylized as Ty Dolla $ign or Ty$), is an American singer, rapper, songwriter, and record producer.
 He first gained major recognition in 2010 for his feature on YG's "Toot It and Boot It", which he had written and produced for Def Jam Recordings.
 In the summer of 2013, he signed a record deal with Wiz Khalifa's Taylor Gang Records.
 In November 2015, he released his debut studio album, "Free TC", which peaked at number 14 on the US "Billboard" 200.
American hip hop recording artist Ty Dolla $ign has released one studio album, two extended plays (EP), seven mixtapes and 41 singles (including 25 as a featured artist).
 In May 2011, Ty Dolla $ign released his first mixtape, "House on the Hill", which includes his debut single "All Stars" featuring Joe Moses.
 After releasing a few more mixtapes throughout 2011 and 2012, Ty Dolla $ign signed a recording contract with Wiz Khalifa's record label Taylor Gang.
 In January 2014, he released his major label debut "Beach House EP", via Taylor Gang Records and Atlantic Records.
 The EP includes hit singles "Paranoid" and "Or Nah".
 Ty Dolla $ign released his debut studio album, "Free TC" on November 13, 2015.
 The album includes the hit singles "Blasé", "Saved" and "Wavy".
"Drop That Kitty" is a song by American rapper Ty Dolla Sign, featuring English singer Charli XCX and American singer Tinashe.
 The track was produced by Stargate and Cashmere Cat.
 The song was written by Ty Dolla Sign, Tinashe, and Charlotte Atichison.
 It was released as digital download in the United States on February 17, 2015, originally intended as the first single from "Free TC" but was later scrapped.
 Sign raps the track's main verses, while XCX sings its chorus hook and Tinashe its bridge and pre-chorus hook.
 The lyrical content in the song serve as a four-step dance instructional and contain several sexual euphemisms and innuendos.
 It discusses a scenario of meeting someone attractive in a club and communicating basest desires to them, while extolling the virtues of physical flexibility.
Dacoury Natche (born March 10, 1983), professionally known as DJ Dahi, is an American DJ, songwriter and record producer from Inglewood, California.
 Dahi is perhaps best known for producing "Worst Behavior" by Canadian rapper Drake, as well as American rapper Kendrick Lamar's critically acclaimed album cut "Money Trees", which features Lamar's label-mate Jay Rock.
 Dahi has also produced several tracks for various artists such as Dr. Dre, Lily Allen, Freddie Gibbs, Dom Kennedy, Lupe Fiasco, Vince Staples, Mac Miller, Ty Dolla Sign, Pac Div, Travi$ Scott, Vic Mensa, Casey Veggies, Smoke DZA, Big Sean, Tinashe, Logic, and Big K.R.I.T., among others.
 Aside from his solo production career, Dahi is also a member of production team D.R.U.G.S., alongside Chordz 3D, Buddah Shampoo, Nate 3D, James Koo, Fuego and Ty Dolla Sign.
 He is currently working on an album with LOTB.
 The album is set to release early August.
Ohio is the debut studio album by American rapper Stalley.
 The album was released on October 27, 2014, by Maybach Music Group and Atlantic Records.
 The album features guest appearances from Nipsey Hussle, Rick Ross, August Alsina, Ty Dolla Sign, Rashad and De La Soul.
 The album was supported by the singles "Always Into Something", "Jackin' Chevys" and "One More Shot".
Campaign is the ninth mixtape by American singer and rapper Ty Dolla Sign.
 It was first released commercially on September 23, 2016, by Atlantic Records.
 The mixtape was supported by three singles: "Campaign" featuring Future, "No Justice" featuring Big TC, and "Zaddy".
 The mixtape is a recurring theme expressing the views of Ty Dolla Sign and his friends and family on the presidential campaigns of Donald Trump and Hillary Clinton.
My Krazy Life is the debut studio album by American rapper YG.
 It was released on March 18, 2014, by Pu$haz Ink, CTE World and Def Jam Recordings.
 Recording sessions took place from 2012 to 2014 in various recording studios, mostly from Atlanta, Georgia to Los Angeles, California.
 The album features guest appearances from Kendrick Lamar, Drake, Lil Wayne, Nicki Minaj, Rich Homie Quan, Ty Dolla Sign, Schoolboy Q, Meek Mill, Jay Rock, Jeezy, TeeFlii and RJ, while the production was primarily handled by frequent collaborator DJ Mustard, along with production from Ty Dolla Sign and Terrace Martin.
Free TC is the debut studio album by American singer and rapper Ty Dolla Sign.
 It was released on November 13, 2015, by Atlantic Records.
 As executive producers by Ty Dolla Sign and Wiz Khalifa enlisted a variety of collaborators; including DJ Mustard, DJ Spinz, Cardo, Johnny Juliano, R. Kelly, Kendrick Lamar, Brandy and Kanye West, among others.
"Saved" is a song by American singer Ty Dolla Sign included on his debut studio album, "Free TC " (2015), and features American rapper E-40.
 The track was released on October 16, 2015, as the third single from the album.
 It was written by Ty, E-40, Glenda Proby, Bobby Brackins, DJ Mustard and Twice as Nice, with production helmed by the latter two.
 The official music video for "Saved" was released on November 16, 2015.
 It was directed by Elliott Sellers.