Problem: Background: A marching band is a group in which instrumental musicians perform while marching, often for entertainment or competition. Instrumentation typically includes brass, woodwind, and percussion instruments. Most marching bands wear a uniform, often of a military style, that includes an associated school or organization's colors, name or symbol. Most high school marching bands, and some college marching bands, are accompanied by a color guard, a group of performers who add a visual interpretation to the music through the use of props, most often flags and rifles.
Context: Traditional Style bands, also known as Show Bands, are marching bands geared primarily towards crowd entertainment and perform on football fields. Typically, they perform a routine before the game, another at halftime, and sometimes after the game as well. Competitive show bands perform only one show that is continually refined throughout a season, while bands that focus on entertainment rather than competition usually perform a unique show for each game. These shows normally consists of three to five musical pieces accompanied by formations rooted in origin from Patterns in Motion, a book penned by band director William C. "Bill" Moffit, bandmaster of Purdue University All-American Marching Band and University of Houston Spirit of Houston.  A recognizable style of show band is the one fielded by historically black colleges and universities (HBCUs). HBCU bands utilize the traditional "ankle-knee" high step and music selections are largely based on R&B, hip-hop, and contemporary popular music. In addition to traditional drill formations, HBCU bands feature heavily choreographed dance routines as part of their performances. Many of these bands may have a twirler line and/or a dancer line, but not necessarily flag twirlers. One of the most notable depictions of HBCU bands is the film Drumline. HBCU bands are a significant part of African-American musical culture and HBCU bands often surpass their associated football teams in popularity, a phenomenon that is uncommon among collegiate and high school marching bands. In 1989, as part of the celebrations for the bicentennial of the French Revolution, the Florida A&M University Marching 100, one of the most prolific HBCU bands in the country, was selected as the official representative of the United States in the bicentennial parade.  Another style of show band is that used by many of the Big Ten Conference marching bands, a semi-military and semi-corps style. These bands perform a show that is designed to entertain the audience, but feature more traditional symphonic styles of music (marches, film scores, jazz, or older pop music) as well as some contemporary music. Big Ten style show bands have been influential in creating some of the earliest marching band innovations, and the style is used in high schools throughout much of the United States.  Most show bands of either type include the traditional military band instrumentation of woodwinds, brass, and battery percussion. Some also include the front ensemble keyboard percussion, and may also incorporate the use of a color guard for flag, and rifle routines as well as a dance line.
Question: What is the significance of these bands?
Answer: Big Ten style show bands have been influential in creating some of the earliest marching band innovations,

Problem: Background: John Winston Ono Lennon  (9 October 1940 - 8 December 1980) was an English singer, songwriter, and peace activist who co-founded the Beatles, the most commercially successful band in the history of popular music. He and fellow member Paul McCartney formed a much-celebrated songwriting partnership. Along with George Harrison and Ringo Starr, the group would ascend to world-wide fame during the 1960s.
Context: During his marriage to Cynthia, Lennon's first son Julian was born at the same time that his commitments with the Beatles were intensifying at the height of Beatlemania. Lennon was touring with the Beatles when Julian was born on 8 April 1963. Julian's birth, like his mother Cynthia's marriage to Lennon, was kept secret because Epstein was convinced that public knowledge of such things would threaten the Beatles' commercial success. Julian recalled that as a small child in Weybridge some four years later, "I was trundled home from school and came walking up with one of my watercolour paintings. It was just a bunch of stars and this blonde girl I knew at school. And Dad said, 'What's this?' I said, 'It's Lucy in the sky with diamonds.'" Lennon used it as the title of a Beatles song, and though it was later reported to have been derived from the initials LSD, Lennon insisted, "It's not an acid song." McCartney corroborated Lennon's explanation that Julian innocently came up with the name. Lennon was distant from Julian, who felt closer to McCartney than to his father. During a car journey to visit Cynthia and Julian during Lennon's divorce, McCartney composed a song, "Hey Jules", to comfort him. It would evolve into the Beatles song "Hey Jude". Lennon later said, "That's his best song. It started off as a song about my son Julian ... he turned it into 'Hey Jude'. I always thought it was about me and Yoko but he said it wasn't."  Lennon's relationship with Julian was already strained, and after Lennon and Ono moved to Manhattan in 1971, Julian would not see his father again until 1973. With Pang's encouragement, arrangements were made for Julian (and his mother) to visit Lennon in Los Angeles, where they went to Disneyland. Julian started to see his father regularly, and Lennon gave him a drumming part on a Walls and Bridges track. He bought Julian a Gibson Les Paul guitar and other instruments, and encouraged his interest in music by demonstrating guitar chord techniques. Julian recalls that he and his father "got on a great deal better" during the time he spent in New York: "We had a lot of fun, laughed a lot and had a great time in general."  In a Playboy interview with David Sheff shortly before his death, Lennon said, "Sean was a planned child, and therein lies the difference. I don't love Julian any less as a child. He's still my son, whether he came from a bottle of whiskey or because they didn't have pills in those days. He's here, he belongs to me, and he always will." He said he was trying to re-establish a connection with the then 17-year-old, and confidently predicted, "Julian and I will have a relationship in the future." After his death it was revealed that he had left Julian very little in his will.
Question: when was he born?
Answer:
Julian was born on 8 April 1963.