Background: Palmer was born to Doris (Morrison) and Milfred Jerome "Deacon" Palmer (1905-1976) in Latrobe, Pennsylvania, a working-class steel mill town. He learned golf from his father, who had suffered from polio at a young age and was head professional and greenskeeper at Latrobe Country Club, which allowed young Arnold to accompany his father as he maintained the course. Palmer attended Wake Forest College on a golf scholarship. He left upon the death of close friend Bud Worsham (1929-1950) and enlisted in the U.S. Coast Guard, where he served for three years, 1951-1954.
Context: Palmer's early "fear of flying" was what led him to pursue his pilot certificate. After almost 55 years, he logged nearly 20,000 hours of flight time in various aircraft. His personal website reads:  Next to marrying his wife, Winnie, and deciding on a professional career in golf, there's only one decision Arnold Palmer considers smarter. Learning how to fly an airplane.  On Palmer's 70th birthday in 1999, Westmoreland County Airport in Latrobe was renamed Arnold Palmer Regional Airport in his honor. According to their website: "[The airport] started as the Longview Flying Field in 1924. It became J.D. Hill Airport in 1928, Latrobe Airport in 1935 and Westmoreland County Airport in 1978. Complementing a rich history rooted in some of the earliest pioneers of aviation, the name was changed to Arnold Palmer Regional in 1999 to honor the Latrobe native golf legend who grew up less than a mile from the runway where he watched the world's first official airmail pickup in 1939 and later learned to fly himself." There is a statue of Palmer made by Zenos Frudakis, holding a golf club in front of the airport's entrance, unveiled in 2007.  Palmer thought he would pilot a plane for the last time on January 31, 2011, and flew from Palm Springs in California to Orlando in his Cessna Citation X. His pilot's medical certificate expired that day and he chose not to renew it. However, public FAA records show he was issued a new third-class medical in May 2011.
Question: What happened after January 31,2011?
Answer: His pilot's medical certificate expired that day and he chose not to renew it.

Background: Steeleye Span are an English folk rock band formed in 1969. Still active today, along with Fairport Convention, they are amongst the best known acts of the British folk revival, and were among the most commercially successful, thanks to their hit singles "Gaudete" and "All Around My Hat". They had four Top 40 albums and achieved a certified gold record with sales of "All Around My Hat". Throughout their history, Steeleye Span have seen many personnel changes.
Context: Reported difficulties among band members saw a split during the recording of Bedlam Born. Woods reportedly was uncomfortable with the financial arrangements of the band, health problems forced Johnson into retirement, and drummer Dave Mattacks' period as an unofficial member came to an end during this time.  For a while the band consisted of just Peter Knight and Tim Harries, plus various guest musicians, as they fulfilled live commitments. Rick Kemp resumed playing with the band at some of these gigs, with Harries switching to lead guitar. This was an uncertain time for the future of the band, and when Harries announced he was not keen to continue his role, even the willingness of Kemp to return to the line-up full-time was not enough to prevent what was effectively a break-up.  In 2002, Steeleye Span reformed with a "classic" line-up (including Prior), bringing an end to the uncertainty of the previous couple of years. Knight hosted a poll on his website, asking the band's fans which Steeleye songs they would most want to see the band re-record. Armed with the results, Knight persuaded Prior and Genockey to rejoin, coaxed Johnson out of a health-induced retirement, and along with Kemp and Knight, they released Present--The Very Best of Steeleye Span (2002), a 2-disc set of new recordings of the songs.  But Bob Johnson's health prevented him from playing live shortly before the 2002 comeback tour, and he was replaced at the eleventh hour on guitar by Ken Nicol, formerly of the Albion Band. Nicol had been talking with Rick Kemp about forming a band when Kemp invited him to play for the tour, and this was to herald a significant return to form for the band.
Question: did they ever breakup again?
Answer: Bob Johnson's health

Background: Darrell Lance Abbott (August 20, 1966 - December 8, 2004), also known as Dimebag Darrell and Diamond Darrell, was an American musician and songwriter who was a co-founder of Pantera alongside his brother Vinnie Paul, and founder of Damageplan. He was considered to be one of the driving forces behind groove metal. Abbott was shot and killed by a gunman while on stage during a performance with Damageplan on December 8, 2004, at the Alrosa Villa in Columbus, Ohio. He ranked No. 92 in Rolling Stone magazine's 100 Greatest Guitarists and No. 1 in the UK magazine Metal Hammer.
Context: Abbott formed Pantera in 1981 with his brother Vinnie Paul on drums. Originally, he called himself Diamond Darrell Lance. The band was influenced with thrash metal acts such as Slayer, Megadeth, Venom, and Metallica as well as traditional metal bands such as Black Sabbath, Iron Maiden, Motorhead, and Judas Priest. Shortly after singer Phil Anselmo joined Pantera, Darrell was invited by Dave Mustaine to join Megadeth. Darrell was willing to join, but on the condition that Mustaine also hire his brother Vinnie on drums. As Mustaine already had a drummer, Chuck Behler, Darrell decided to stay with Pantera.  Pantera would go on to become a key formulator of the post-thrash subgenre of "groove" metal. It would not be until nine years after forming that Pantera saw its first piece of commercial success in its 1990 major label debut, Cowboys from Hell. Pantera's "groove" style came to fruition in its breakthrough album Vulgar Display of Power, released on February 25, 1992, which saw the replacement of the power metal falsetto vocals with a hardcore-influenced shouted delivery and heavier guitar sound. On Pantera's 1994 album Far Beyond Driven, Abbott, who'd been listed on all prior albums under the moniker "Diamond Darrell", was listed as "Dimebag Darrell". On the night before Pantera's live appearance at the Monsters of Rock in England's Donington Park, the Abbott brothers got involved in altercations at a local club with journalists from magazines Kerrang! and Raw.  Pantera began to suffer from mounting tensions between band members in the mid-1990s, largely due to vocalist Phil Anselmo's rampant drug abuse.  In 2001, the group went on hiatus, during which time Anselmo worked on side projects, such as Superjoint Ritual and Down. This caused more friction within the band, as the Abbott brothers kept waiting for Anselmo to become available to work with them again. The frustration with Anselmo led to their decision to disband Pantera in 2003.
Question: What was the purpose of the band?
Answer:
Pantera would go on to become a key formulator of the post-thrash subgenre of "groove" metal.