Problem: Background: 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.
Context: 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.
Question: Why was curtly less effective?
Answer: knee injury, which necessitated surgery after the English season,

Problem: Background: Stephen Ray Vaughan (October 3, 1954 - August 27, 1990) was an American musician, singer, songwriter, and record producer. In spite of a short-lived mainstream career spanning seven years, he was one of the most influential guitarists in the revival of blues in the 1980s. AllMusic describes him as "a rocking powerhouse of a guitarist who gave blues a burst of momentum in the '80s, with influence still felt long after his tragic death." Born and raised in Dallas, Texas, Vaughan began playing guitar at the age of seven, inspired by his older brother Jimmie.
Context: In May 1969, after leaving the Brooklyn Underground, Vaughan joined a band called the Southern Distributor. He had learned The Yardbirds' "Jeff's Boogie" and played the song at the audition. Mike Steinbach, the group's drummer, commented: "The kid was fourteen. We auditioned him on 'Jeff's Boogie,' really fast instrumental guitar, and he played it note for note." Although they played pop rock covers, Vaughan conveyed his interest in the addition of blues songs to the group's repertoire; he was told that he wouldn't earn a living playing blues music and the band parted ways. Later that year, bassist Tommy Shannon walked into a Dallas club and heard Vaughan playing guitar. Fascinated by the skillful playing, which he described as "incredible even then", Shannon borrowed a bass guitar and the two jammed. Within a few years, they began performing together in a band called Krackerjack.  In February 1970, Vaughan joined a band called Liberation, which was a nine-piece group with a horn section. Having spent the past month briefly playing bass with Jimmie in Texas Storm, he had originally auditioned as bassist. Impressed by Vaughan's guitar playing, Scott Phares, the group's original guitarist, modestly became the bassist. In mid-1970, they performed at the Adolphus Hotel in downtown Dallas, where ZZ Top asked them to perform. During Liberation's break, Vaughan jammed with ZZ Top on the Nightcaps song "Thunderbird". Phares later described the performance: "They tore the house down. It was awesome. It was one of those magical evenings. Stevie fit in like a glove on a hand."  Attending Justin F. Kimball High School during the early 1970s, Vaughan's late-night gigs contributed to his neglect in his studies, including music theory; he would often sleep during class. His musical career pursuit was disapproved by many of the school's administrators, but he was also encouraged by many people to strive for a career in art, including his art teacher. In his sophomore year, he attended an evening class for experimental art at Southern Methodist University, but bailed when it conflicted with rehearsal. Vaughan later spoke of his dislike of the school and stated that he had to receive a daily note from the principal about his grooming.
Question: Did he play any other instruments
Answer:
bassist.