Problem: Background: Darrell Lee Waltrip (born February 5, 1947) is an American motorsports analyst, author, national television broadcaster, and former racing driver. He is also a three-time NASCAR Cup Series champion (1981, 1982, 1985) and a three-time NASCAR Cup Series runner-up (1979, 1983, 1986). Posting a modern NASCAR series record of 22 top five finishes in 1983 and 21 top five finishes both in 1981 and 1986, Waltrip won 84 NASCAR Cup Series races, including the 1989 Daytona 500, a record five in the Coca-Cola 600 (formerly the World 600) (1978, 1979, 1985, 1988, 1989), and a track and Series record for any driver at Bristol Motor Speedway with 12 (seven consecutive from 1981 to 1984). Those victories tie him with Bobby Allison for fourth on the NASCAR's all-time wins list in the Cup Series and place him second to Jeff Gordon for the most wins in NASCAR's modern era.
Context: Waltrip started in NASCAR Winston Cup, NASCAR's top racing series at age 25, (25 years, 3 months, 2 days), on May 7, 1972, at the 1972 Winston 500, at Talladega, Alabama, the series' fastest and longest track at 2.66 miles, (4.281 kilometers), driving a 1969 Mercury Cyclone he purchased from Holman Moody, originally the Ford Fairlane driven by Mario Andretti to victory in the 1967 Daytona 500. Waltrip finished 38th in his first NASCAR Winston Cup race after retiring on lap 69 due to engine failure. Waltrip paid $12,500 for the car, a spare engine and some spare parts and drove it in 5 cup series events until mid-1973. The car was converted from the Ford Fairlane Andretti drove, to a 1969 Mercury Cyclone as driven by Waltrip, and later converted to a 1971 Mercury Cyclone. The car was sponsored by Terminal Transport of Owensboro, Kentucky, Waltrip's first major sponsor. Waltrip still owns the car today as part of a collection of cars he has raced and is one of his favorites.  The early years found Waltrip competing against legendary stock car racers such as Richard Petty, David Pearson, Cale Yarborough, and Bobby Allison, among others. Waltrip soon earned the respect of his more experienced peers. He was given the #95 as a number but Waltrip preferred car #17 because his hero, David Pearson, had success with the number in earlier years. As an owner/driver, Waltrip ran 5 races in 1972, 14 races in 1973, 16 races in 1974, with 7 top-five finishes, and 17 races as an owner/driver in 1975, with his first Winston Cup victory coming at his home track, May 10, 1975, at age 28, (28 years, 3 months, 5 days), in the Music City 420, outpacing the field by two laps at the track where he had won 2 track championships in Nashville, Tennessee, in the #17 Terminal Transport Chevrolet, a car Waltrip owned.  During the 1973 season, Waltrip drove 5 NASCAR Cup races for Bud Moore Engineering.
Question: What happened during his early years in Nascar?
Answer: Waltrip started in NASCAR Winston Cup, NASCAR's top racing series at age 25,

Problem: Background: Yen was born in Guangzhou, China. His mother, Bow-sim Mark, is a Fu Style Wudangquan (internal martial arts) and Tai Chi grandmaster, while his father, Klyster Yen (Zhen Yun Long ), is a newspaper editor. When he was two years old, his family moved to Hong Kong and then to Boston when he was 11. His younger sister, Chris Yen, is also a martial artist and actress, and appeared in the 2007 film Adventures of Johnny Tao: Rock Around the Dragon.
Context: In his prime, Donnie stood at 5 feet 8 inches and weighed 165 pounds. Donnie Yen is known to be a very well-built and muscular actor. Within the Hong Kong cinematic industry, Yen is renowned for his physical fitness, strength, and speed achieved through his use of a strict and disciplined fitness regimen to build up strength and fitness.  However, despite his muscular build, Yen has gained tremendous attention for his dedication to his roles and for the lengths to which he goes to achieve the physical build and appearance of the characters he plays. In 2007, Yen lost over 30 pounds to reach the weight of 120 pounds to better portray the slender Ip Man and the techniques of wing chun, which focuses on techniques and not strength. He did so through a very strict regimen of limiting himself to one meal per day.  In 2010, still fresh off Ip Man 2, Yen was cast as Chen Zhen in Legend of the Fist: The Return of Chen Zhen, which was originally portrayed by Bruce Lee. He had to regain his muscular physique for the role and took 6 months through a very delicate and dedicated diet routine. Focusing on high-protein drinks and vitamin and mineral supplements, he managed to hit 165 pounds for the role. He maintained this bulk and physique while filming The Lost Bladesman, in which he plays Guan Yu, a Chinese general known for his size and spear-fighting abilities.  In 2015, Yen reduced his muscular physique yet again to reprise the role of Ip Man in Ip Man 3 and for his role as the blind warrior monk Chirrut Imwe in Rogue One: A Star Wars Story. For his role as Xiang in XXX: Return of Xander Cage opposite Vin Diesel, Yen rebuilt his physique.
Question: How was he able to do it?
Answer: