Question: What was the first EP of the singer who recorded What Ifs?

full_context: Document 1: If I Was Your Man: "If I Was Your Man" is a song by American recording artist Joe. It was written by Mikkel Storleer Eriksen and Tor Erik Hermansen along with Phillip Lamont Jackson for his sixth studio album "Ain't Nothin' Like Me" (2007), with production handled by the former two for Stargate. The contemporary R&B ballad was selected as the album's second single and released to US radios on July 13, 2007. It peaked at number 84 on the "Billboard" Hot 100 and reached the top forty of the Hot R&B/Hip-Hop Songs chart. The song's accompanying music video features a cameo appearance by actor Blair Underwood and was inspired by the ending scene of the film "Casablanca" as his love interest leaves Joe for the man in the plane.
Document 2: What About Us (Pink song): "What About Us" is a song by American singer and songwriter Pink. It was written by Pink, Steve Mac and Johnny McDaid, with production handled by Mac. The song was released through RCA Records on August 10, 2017, as the lead single from Pink's upcoming seventh studio album, "Beautiful Trauma" (2017), along with its pre-order.
Document 3: Jake Owen: Joshua Ryan "Jake" Owen (born August 28, 1981) is an American country music singer and songwriter. Signed to RCA Nashville in 2006, he released his debut studio album "Startin' with Me" that year. This album produced three singles, all of which reached top 20 on the "Billboard" Hot Country Songs chart: his debut single "Yee Haw", "Startin' with Me", and "Something About a Woman". A second studio album, 2009's "Easy Does It", has accounted for three more singles: "Don't Think I Can't Love You", "Eight Second Ride", and "Tell Me". In September 2011, Owen achieved his first number one hit on the country charts with the title track to his third studio album "Barefoot Blue Jean Night", as did with "Alone with You", "The One That Got Away", and "Anywhere with You". His fourth studio album, "Days of Gold" produced two singles with its title track, which broke the top 20 in 2014, and the number one single "Beachin'".
Document 4: Whatever It Is: "Whatever It Is" a song by the Zac Brown Band, an American country music group. It is the second single release from the 2008 album "The Foundation" and the band's second Top 3 hit on the "Billboard" country singles charts. The song is the follow-up to the band's number-one debut single "Chicken Fried".
Document 5: Kane Brown: Kane Allen Brown (born October 21, 1993) is an American country music singer and songwriter. He first came to the attention of the public through social media. He released his first EP, titled "Closer", in June 2015. A new single "Used to Love You Sober" was released in October 2015. After Brown signed with RCA Nashville in early 2016, the actual song was included on his EP "Chapter 1", which was released in March 2016. He released his first full-length album, the self-titled "Kane Brown" on December 2, 2016.
Document 6: Bourbon in Kentucky: "Bourbon in Kentucky" is a song written by Ryan Tyndell, Hillary Lindsey, and Gordie Sampson, and recorded by American country music artist Dierks Bentley with backing vocals by Kacey Musgraves. It is the first single from his seventh studio album, "Riser". The song peaked at #45 on Country Airplay six weeks after its release date, becoming Bentley's lowest charting single at the time. He later spoke on the records disappointing performance while promoting the album release, stating that it "bombed" and that "we knew" it was a big risk releasing a dark song as the first single in summertime but he was happy with the great reception it got from his core fanbase.
Document 7: Used to Love You Sober: "Used to Love You Sober" is a song recorded by American country music singer Kane Brown. It was first released on October 21, 2015, then re-released under the Sony / RCA Nashville label on February 16, 2016 after Kane was signed to the label. The song is written by Kane Brown together with Josh Hoge and Matt McVaney.
Document 8: Buddy Brown (musician): Buddy Brown is a traditional American country music singer-songwriter who was discovered as a YouTube sensation. Brown was born on May 12, 1982 to Dan and Cheryl Brown in Madison, Mississippi, a suburb of Jackson. When Brown was nine years old, his family decided to relocate to Orlando, Florida for his father’s career. In 2005, he graduated from Mississippi State with a degree in Psychology. On October 13, 2009, he released a cover of Easton Corbin’s "A Little More Country Than That" that went viral. A year later, he opened up for country music legend, John Anderson in Wildwood, FL. On July 4, 2012, he released his first album titled Mason Jar. His fan base pushed his first full-length CD to No. 34 on the iTunes country chart without a record deal. March 11, 2014, he released a self-titled EP, Buddy Brown. On October 14, 2014, Buddy released his second EP, Keepin’ It Country. This EP reached to No. 12 on the iTunes charts. In January 2014, Billboard put Keepin’ It Country on their Heat Seekers Albums list. USA Today published a story on Brown, labeling him as a "YouTube Sensation." His single "Takin’ You Huntin’" landed him a spot on the front page and an online feature in the Clarion Ledger.
Document 9: Don't Go City on Me: "Don't Go City on Me" is a debut song written and recorded by American country music singer Kane Brown. It was released on October 22, 2014 as a single from Brown's EP "Closer."
Document 10: What Ifs: "What Ifs" is a song recorded by American country music singer Kane Brown for his self-titled debut album, with Lauren Alaina featuring. The song was released with the album through RCA Nashville and was released on February 6, 2017.
Document 11: Closer (Kane Brown EP): Closer is the debut extended play (EP) by American country music singer Kane Brown. Brown released the EP in early June 2015 after raising funds via Kickstarter.
Document 12: Chapter 1 (EP): Chapter 1 is the second extended play (EP) by American country music singer Kane Brown who is signed with Sony Music Nashville in early 2016. The five-song EP was released on March 18, 2016, as his first EP with the Sony label although he had an earlier independently released EP on his own label titled "Closer". "Chapter 1" is considered a prelude to his debut studio album scheduled later in 2016.
Document 13: Lauren Alaina: Lauren Alaina (born Lauren Alaina Kristine Suddeth; November 8, 1994) is an American country music singer and songwriter from Rossville, Georgia. Alaina was the runner-up on the tenth season of "American Idol". Her debut studio album, "Wildflower" was released on October 11, 2011. Her second album, "Road Less Traveled" was released January 27, 2017. She later achieved her first number one on the Country Airplay chart with its title track.
Document 14: If I'm Honest: If I'm Honest is the tenth studio album by American country music singer Blake Shelton. The album was released on May 20, 2016, by Warner Bros. Nashville. The album was produced by Shelton's longtime producer Scott Hendricks and features collaborations with Gwen Stefani and The Oak Ridge Boys.
Document 15: Kane Brown (album): Kane Brown is the debut studio album by American country music singer Kane Brown. The album was released on December 2, 2016, through RCA Records Nashville. Singles released from the album are "Ain't No Stopping Us Now", "Thunder in the Rain" and "What Ifs". An expanded deluxe edition of the album is set to be released October 6, 2017 featuring four new tracks.
ground_truth: "Closer"