Some context: Santana is a Latin music and rock band formed in San Francisco, California in 1966 by Mexican-American guitarist Carlos Santana. The band came to public attention with their performance of "Soul Sacrifice" at Woodstock in 1969. This exposure helped propel their first album, also named Santana, into a hit, followed in the next two years by Abraxas and Santana III. Lineup changes were common.
13 months after Caravanserai, Santana released Welcome. Welcome was the first of four consecutive albums to achieve gold certification, as opposed to the previous four, which all at least reached platinum status. The album peaked at number 25 on the Billboard 200, the lowest of the band's career so far. The next few albums contained a more experimental style than their previous work, beginning with Borboletta, which fared arguably worse than its predecessor, despite climbing five spots on the US charts.  The group's 1976 release, Amigos, was far more successful. Reaching number 10 on the US charts, and also hitting the top 10 in France, Australia, New Zealand, Austria and The Netherlands, it was a form of return to the success of their early albums. Festival, somewhat contradicted that new-found success, but was a short blip before another successful album, Moonflower, released in 1977. The album was possibly the most successful since Santana III, achieving 2x platinum in the US, and being the first album since 1974's Borboletta, to break the top 10 in the UK. It was characterized by a stylistic shift for the band, as it contained heavier influences from the more conventional sound of the group's early work, while still maintaining the experimental sound of their last few albums.  Their next two releases, Inner Secrets and Marathon, released in 1978 and '79, respectively, were a further musical shift for the band, moving away from the Latin-fused rock music that had characterized their work in the late 1960s and the majority of the '70s, to move towards a more album-oriented, conventional rock sound. These albums, however, fared poorly commercially, although both achieved gold status in the US.
What came of this experimentation?
A: The next few albums contained a more experimental style than their previous work, beginning with Borboletta, which fared arguably worse than its predecessor,

Question: Sir Curtly Elconn Lynwall Ambrose, KCN (born 21 September 1963) is a former cricketer from Antigua who played 98 Test matches for the West Indies. A fast bowler, he took 405 Test wickets at an average of 20.99 and topped the ICC Player Rankings for much of his career to be rated the best bowler in the world. His great height--he is 6 feet 7 inches (2.01 m) tall--allowed him to make the ball bounce unusually high after he delivered it; allied to his pace and accuracy, it made him a difficult bowler for batsmen to face. A man of few words during his career, he was notoriously reluctant to speak to journalists.

During the 1991-92 season, West Indies played mainly one-day cricket, taking part in tournaments in Sharjah--where Ambrose took seven wickets, including an analysis of five for 53--and Australia, and took part in the World Cup in Australia and New Zealand. In this tournament, Ambrose took seven wickets in seven games at an average of 33.57 and was the seventh most economical bowler among those who played more than one game. West Indies finished sixth in the qualifying table and failed to reach the semi-finals. Ambrose returned home to play twice for the Leeward Islands in January 1992.  In April 1992, South Africa toured West Indies for the first time, and played their first Test match for 22 years. Ambrose played in all three ODIs, all of which were won by West Indies. The Test match was the first time West Indies bowled under a new playing regulation which permitted only one bouncer per over; this seemed to affect the home bowlers, but Ambrose took two for 47 from 36 overs. South Africa began the final day of the match requiring 79 runs to win with just two batsmen out, but Ambrose and Courtney Walsh took the last eight wickets for 26 runs to bowl West Indies to a 52-run win. On a difficult pitch for batting, the ball bounced unevenly, and both bowlers concentrated on accuracy. Ambrose took six for 34 in the second innings, and was named joint man of the match; in just over 60 overs, he took eight for 81 in the match.  Returning to play for Northamptonshire, he was less effective. Hampered by a knee injury, which necessitated surgery after the English season, and suffering from many dropped catches, he took 50 first-class wickets at an average of 26.14, but his performance compared unfavourably with other bowlers on the team. He was more effective in the NatWest Trophy, a one-day competition that Northamptonshire won that season, in which he conceded fewer than two runs per over across five games.

Using a quote from the above article, answer the following question: How did he develop a slower ball?
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Answer: 

Some context: Ambrose was born in Lovington, Illinois, to Rosepha Trippe Ambrose and Stephen Hedges Ambrose. His father was a physician who served in the U.S. Navy during World War II.
Ambrose was the lone historian featured in the 1973-74 ITV television series, The World at War, which detailed the history of World War II.  He served as the historical consultant for the movie Saving Private Ryan. Tom Hanks, who starred in the movie, said he "pored over D-Day" and Band of Brothers in researching his role. Hanks also credited Ambrose's books with providing extensive detail, particularly regarding D-Day landings.  The HBO mini-series, Band of Brothers (2001), for which he was an executive producer, helped sustain the fresh interest in World War II that had been stimulated by the 50th anniversary of D-Day in 1994 and the 60th anniversary in 2004. Ambrose served as executive producer for Price for Peace, a documentary concerning the war in the Pacific theater during World War II, and for Moments of Truth, a TV documentary containing interviews with World War II veterans.  In addition, Ambrose served as a commentator for Lewis & Clark: The Journey of the Corps of Discovery, a documentary by Ken Burns. He provided commentary in twenty made-for TV documentaries, covering diverse topics, such as World War II, Lewis & Clark, and America's prominence in the 20th century. He also appeared as a guest on numerous TV programs or stations, including The Charlie Rose Show, C-Span programming, CNN programming, NBC's Today Show, CNBC's Hardball, and various programming on The History Channel and the National Geographic Channel. Ambrose's association with National Geographic stemmed, in part, from his designation as an Explorer-in-Residence by the Society.  In addition to his academic work and publishing, Ambrose operated a historical tour business, acting as a tour guide to European locales of World War II. Also, he served on the board of directors for American Rivers and was a member of the Lewis and Clark Bicentennial Council.
Any other interesting information?
A:
Tom Hanks, who starred in the movie, said he "pored over D-Day" and Band of Brothers in researching his role.