Question: Which American rapper co-wrote a song featured on the album unfold?

<P0-S0> Watchout! <P0-S1>  is the fourth studio album and fifth album overall by Martha and the Vandellas, released on the Gordy (Motown) label in 1966. <P0-S2>  The album featured the hit singles, "I'm Ready for Love" and "Jimmy Mack" and the ballad single, "What Am I Gonna Do Without Your Love?" <P0-S3>  This was one of the last albums by the girls to feature songs from Holland, Dozier, Holland, who the following year would leave Motown, as was with William "Mickey" Stevenson, the man who helped put the group on the musical map. <P0-S4>  The title of the album "Watchout!" <P0-S5>  was derived from a song featured on the flip-side of their hit single "My Baby Loves Me" (released earlier in 1966) entitled "Never Leave Your Baby's Side" (never released on an album). <P0-S6>  That song featured a chorus from the Vandellas which warned to "Watchout!" <P0-S7>  for "other girls" who could steal your man. <SEP> <P1-S0> American rapper Nicki Minaj has recorded songs for three studio albums, one re-issue and three mixtapes, some of which were collaborations with other performers. <P1-S1>  Her debut album, "Pink Friday", was released in November 2010. " <P1-S2> Your Love" was released as the lead single; it contains a sample of British singer-songwriter Annie Lennox's song "No More I Love You's". <P1-S3>  Minaj wrote the songs "Roman's Revenge" (which features American rapper Eminem) and "Here I Am" in collaboration with producer Swizz Beatz. <P1-S4>  "Roman's Revenge" references both artists' alter-egos, Roman Zolanski for Minaj and Slim Shady for Eminem. <P1-S5>  She co-wrote the song "Did It On'em" with Grammy Award-winning American producer Bangladesh, alongside Justin Ellington and Safaree Lloyd Samuels. <P1-S6>  Minaj and J. R. Rotem worked together on the seventh and eighth single releases "Girls Fall Like Dominoes" and "Fly", which features Bajan recording artist Rihanna. <P1-S7>  On "Girls Fall Like Dominoes", Minaj raps about how she can steal fans from male artists in the music industry, specifically Lil Wayne and Drake. <P1-S8>  Rihanna's contribution to the "inspirational" ballad "Fly" was added at Minaj's request, as noted by Jayson Rodriquez writing for MTV News. <P1-S9>  Andrew "Pop" Wansel and Warren "Oak" Felder co-wrote three tracks with Minaj, including "Your Love", "Save Me" and "Muny". <SEP> <P2-S0> Unfold is the debut solo album by singer/songwriter Marié Digby. <P2-S1>  The album features the singles "Umbrella" (a cover of the Rihanna hit), "Say It Again" and "Stupid for You", and was released on April 8, 2008 in the United States via Hollywood Records. <P2-S2>  The album debuted at #29 on the Billboard 200 with 18,000 copies sold in its first week. <SEP> <P3-S0> "Umbrella" is a song by Barbadian singer Rihanna from her third studio album "Good Girl Gone Bad" (2007). <P3-S1>  The song was originally written with Britney Spears in mind, but her label rejected it. <P3-S2>  "Umbrella" is a pop, hip hop and R&B song referring to a romantic and platonic relationship and the strength of that relationship. <P3-S3>  It features American rapper Jay-Z, who co-wrote the song with its producers Tricky Stewart and Kuk Harrell, with additional writing from The-Dream.