Question: How many times did the athlete who won the 2015 Royal Rumble win the WWE championship?

full_context: Document 1: Money in the Bank (2017): No. Results Stipulations Times The Hype Bros (Mojo Rawley and Zack Ryder) defeated The Colóns (Epico Colón and Primo Colón) Tag team match 8: 30 Carmella (with James Ellsworth) defeated Becky Lynch, Charlotte Flair, Natalya and Tamina Money in the Bank ladder match for a WWE SmackDown Women's Championship contract 13: 20 The New Day (Big E and Kofi Kingston) (with Xavier Woods) defeated The Usos (Jey Uso and Jimmy Uso) (c) by countout Tag team match for the WWE SmackDown Tag Team Championship 12: 00 Naomi (c) defeated Lana by submission Singles match for the WWE SmackDown Women's Championship 7: 30 5 Jinder Mahal (c) (with The Singh Brothers) defeated Randy Orton Singles match for the WWE Championship 20: 50 6 Breezango (Fandango and Tyler Breeze) defeated The Ascension (Konnor and Viktor) Tag team match 3: 50 7 Baron Corbin defeated AJ Styles, Dolph Ziggler, Kevin Owens, Sami Zayn and Shinsuke Nakamura Money in the Bank ladder match for a WWE Championship contract 29: 45 (c) -- refers to the champion (s) heading into the match P -- indicates the match took place on the pre-show
Document 2: Royal Rumble (2015): Six matches were contested at the event, with one being shown on the pre-show. In the main event, Roman Reigns won the traditional Royal Rumble match to receive a shot for the WWE World Heavyweight Championship at WrestleMania 31. Elsewhere on the event's card, The Usos defeated The Miz and Damien Mizdow to retain the WWE Tag Team Championship, while the WWE World Heavyweight Champion Brock Lesnar successfully defended his title against Seth Rollins and John Cena in a triple threat match.
Document 3: List of WWE Champions: The championship is generally contested in professional wrestling matches, in which participants execute scripted finishes rather than contend in direct competition. Some reigns were held by champions using a ring name, while others use their real name. The first champion was Buddy Rogers, who won the championship in 1963. The champion with the single longest reign is Bruno Sammartino with a reign of 2,803 days, while the record for longest combined reign is also held by Sammartino at 4,040. The current champion is Jinder Mahal, who is in his first reign. He won the championship by defeating Randy Orton at Backlash in Rosemont, Illinois on May 21, 2017.
Document 4: Roman Reigns: Anoaʻi then pursued a career in professional wrestling and was signed by WWE in 2010, reporting to their developmental territory Florida Championship Wrestling (FCW). As Roman Reigns, he made his main roster debut in November 2012 alongside Dean Ambrose and Seth Rollins as The Shield. The trio teamed together until June 2014, after which Reigns entered singles competition. Reigns is a three - time WWE World Heavyweight Champion, a one - time United States Champion, a one - time WWE Tag Team Champion (with Rollins), the 2015 Royal Rumble winner and the 2014 Superstar of the Year. He also tied the WWE record for most eliminations in a Survivor Series elimination match with four in the 2013 event and set the record for most eliminations in a Royal Rumble match with 12 in the 2014 event.
Document 5: Extreme Rules (2017): In the main event, Roman Reigns, Seth Rollins, Bray Wyatt, Finn Bálor, and Samoa Joe competed in a fatal five - way extreme rules match to determine the number one contender against Brock Lesnar for the Universal Championship at Great Balls of Fire. After Wyatt and Joe attacked Reigns and Rollins with the steel steps, Wyatt performed a DDT on Rollins onto the steel steps. Joe applied the Coquina Clutch on Bálor, who escaped. Wyatt performed a Side Slam on Reigns onto an announce table. Joe applied the Coquina Clutch on Wyatt, but Bálor struck Joe with a chair. Reigns performed a Spear through the barricade on Bálor and Joe. Rollins performed a Frog Splash on Wyatt through an announce table. Bálor performed a Coup De Grace on Reigns, but as Bálor attempted a pin, Joe applied the Coquina Clutch on Bálor, who passed out, giving Joe the win by technical submission and becoming the number one contender for the Universal Championship.
Document 6: List of current champions in WWE: The WWE Raw Tag Team Championship is currently held by Cesaro and Sheamus, who are in their record - tying third reign as a team; individually, the third reign for Sheamus and the record - tying fourth reign for Cesaro. They won the titles by defeating Dean Ambrose and Seth Rollins on the November 6, 2017, edition of Raw. The WWE SmackDown Tag Team Championship is held by record three - time champions The Usos (Jey and Jimmy Uso). They won the titles by defeating Big E and Xavier Woods of The New Day in a Hell in a Cell match at Hell in a Cell.
Document 7: Elimination Chamber (2018): No. Results Stipulations Times Luke Gallows and Karl Anderson defeated The Miztourage (Bo Dallas and Curtis Axel) Tag team match 8: 50 Alexa Bliss (c) defeated Sasha Banks, Bayley, Mickie James, Sonya Deville, and Mandy Rose Elimination Chamber match for the WWE Raw Women's Championship 29: 35 Cesaro and Sheamus (c) defeated Titus Worldwide (Apollo and Titus O'Neil) (with Dana Brooke) Tag team match for the WWE Raw Tag Team Championship 10: 05 Asuka defeated Nia Jax Singles match; Had Jax won, she would have been added to Asuka's championship match at WrestleMania 34 8: 15 5 Matt Hardy defeated Bray Wyatt Singles match 9: 55 6 Roman Reigns defeated Braun Strowman, Seth Rollins, Finn Bálor, John Cena, Elias, and The Miz Elimination Chamber match for a WWE Universal Championship match at WrestleMania 34 40: 15 (c) -- refers to the champion (s) heading into the match P -- indicates the match took place on the pre-show
Document 8: Elimination Chamber (2018): Six matches were contested at the event, including one on the pre-show. In the main event, Roman Reigns won the first - ever seven - man Elimination Chamber match to become the number one contender against Brock Lesnar for the Universal Championship at WrestleMania 34. On the undercard, Alexa Bliss retained the Raw Women's Championship in the first - ever women's Elimination Chamber match, and Asuka defeated Nia Jax to extend her undefeated streak and to keep Jax from being added to her WrestleMania 34 championship match. The event was also notable for Ronda Rousey signing her Raw contract, where she had a confrontation with Chief Operating Officer Triple H and Raw Commissioner Stephanie McMahon, which was the former's first appearance since the night after Survivor Series.
Document 9: List of WWE Champions: The championship is generally contested in professional wrestling matches, in which participants execute scripted finishes rather than contend in direct competition. Some reigns were held by champions using a ring name, while others use their real name. The first champion was Buddy Rogers, who won the championship in 1963. The champion with the single longest reign is Bruno Sammartino with a reign of 2,803 days, while the record for longest combined reign is also held by Sammartino at 4,040. The current champion is AJ Styles, who is in his second reign. He won the championship by defeating Jinder Mahal on SmackDown Live in Manchester, England on November 7, 2017.
Document 10: Royal Rumble (2018): The main event was the first - ever 30 - woman Royal Rumble match for a women's championship match at WrestleMania 34. Sasha Banks and Becky Lynch were the first and second entrants, respectively. There were numerous surprise entrants throughout the match - including Hall of Famers Lita, Jacqueline, Beth Phoenix, and Trish Stratus; NXT wrestlers Kairi Sane and NXT Women's Champion Ember Moon; and past stars Torrie Wilson, Molly Holly, Michelle McCool (who scored the most eliminations at 5), Vickie Guerrero, and Kelly Kelly. SmackDown's Nikki Bella, who had been on hiatus since WrestleMania 33, and her free agent twin sister Brie Bella were also unannounced entrants. Banks, Asuka (# 25), Nikki, and Brie were the final four. Banks, Nikki, and Brie attacked Asuka, after which, Nikki and Brie eliminated Banks (who lasted the longest at nearly 55 minutes). Asuka attacked Nikki and Brie, but Nikki performed a Rack Attack 2.0 on Asuka and then eliminated Brie. After a back - and - forth exchange, Asuka eliminated Nikki to win the match and earn a women's championship match at WrestleMania 34. After the match, Raw Women's Champion Alexa Bliss and SmackDown Women's Champion Charlotte Flair entered the ring. Before Asuka could make her decision for which title she wanted to challenge for, they were interrupted by the surprise appearance of former UFC star Ronda Rousey, officially confirming she had signed full - time with WWE. Rousey pointed to the WrestleMania sign and offered a handshake to Asuka, who refused. Rousey then shook hands with Raw Commissioner Stephanie McMahon as the event ended. The jacket which Rousey wore during this appearance belonged to life long idol Roddy Piper, whose son let her borrow it.
Document 11: Bullet Club: The group was formed in May 2013, when Irish wrestler Prince Devitt turned on his partner Ryusuke Taguchi and came together with American wrestler Karl Anderson and Tongan wrestlers Bad Luck Fale and Tama Tonga to form a villainous stable of foreigners, which they subsequently named ``Bullet Club ''. Before the end of the year, the stable was also joined by three other Americans; The Young Bucks (Matt Jackson and Nick Jackson) and Doc Gallows. Wrestlers from the Mexican Consejo Mundial de Lucha Libre (CMLL) promotion have also worked tours of NJPW as members of Bullet Club, which led to the formation of an offshoot group named Bullet Club Latinoamerica in CMLL in October 2013. At the end of 2013, Bullet Club held both the IWGP Junior Heavyweight and IWGP Junior Heavyweight Tag Team Championships, while also having conquered three of NJPW's five annual tournaments. The stable marked a major turning point for the career of Devitt, a longtime fan favorite, who began his ascent out of the junior heavyweight division and into the IWGP Heavyweight Championship picture.
Document 12: Elimination Chamber (2015): Seven matches were contested at the event, including one match on the pre-show. The event was the first to include a tag - team Chamber match. In the main event, Dean Ambrose defeated WWE World Heavyweight Champion Seth Rollins by disqualification. Also, Kevin Owens defeated John Cena in his debut match at the event.
Document 13: Royal Rumble (2018): Nine matches were contested at the event, including three on the pre-show. In the main event, Asuka won the first - ever women's Royal Rumble match, which was also the second women's match to main event a WWE pay - per - view, and the first to main event one of WWE's ``Big Four ''pay - per - views. The men's Royal Rumble match was won by Shinsuke Nakamura. Other prominent matches included Brock Lesnar retaining the Universal Championship in a triple threat match against Braun Strowman and Kane, and AJ Styles retained the WWE Championship against Kevin Owens and Sami Zayn in a handicap match. The event was also notable for the surprise appearance of former UFC star Ronda Rousey following the women's match, officially confirming that she had signed full - time with WWE.
Document 14: List of current champions in WWE: At the top of WWE's championship hierarchy are the WWE Championship on SmackDown and the WWE Universal Championship on Raw. The current WWE Champion is Jinder Mahal, who is in his first reign. He won the title at Backlash by defeating Randy Orton. The current WWE Universal Champion is Brock Lesnar, who is in his first reign. He won the title by defeating Goldberg at WrestleMania 33.
Document 15: History of WWE: In April 01, 2002, with an excess of talent employed as a result of having purchased WCW and ECW, WWE needed a way to provide exposure for all of its talent. This problem was solved by introducing a ``Brand Extension '', with the roster split in half and the talent assigned to either Raw or SmackDown! in a mock draft lottery. Wrestlers, commentators and referees became show - exclusive, and the shows were given separate on - screen General Managers. Shortly thereafter, on the June 24, 2002 episode of Raw, Vince McMahon officially referred to the new era as`` Ruthless Aggression''. Later in 2002, after WWE Champion Brock Lesnar announced himself exclusive property of the SmackDown! brand and with the creation of the World Heavyweight Championship, all the championships became show - exclusive too. Additionally, both Raw and SmackDown! began to stage individual pay - per - view events featuring only performers from that brand -- only the major four pay - per - views Royal Rumble, WrestleMania, SummerSlam and Survivor Series remained dual - branded. The practice of single - brand pay - per - view events was abandoned following WrestleMania 23. In effect, Raw and SmackDown were operated as two distinct promotions, with a draft lottery taking place each year to determine which talent was assigned to each brand. This lasted until August 2011, when the rosters were merged and the Brand Extension was quietly phased out.
ground_truth: three
sub_queries: who is the winner of 2015 royal rumble Answer: Roman Reigns
how many times did Roman Reigns win the wwe championship Answer: three