IN: 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.

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: did he play any instruments?
IN: Matthew Fontaine Maury (January 14, 1806 - February 1, 1873) was an American astronomer, United States Navy officer, historian, oceanographer, meteorologist, cartographer, author, geologist, and educator. He was nicknamed "Pathfinder of the Seas" and "Father of Modern Oceanography and Naval Meteorology" and later, "Scientist of the Seas" for his extensive works in his books, especially The Physical Geography of the Sea (1855), the first such extensive and comprehensive book on oceanography to be published. Maury made many important new contributions to charting winds and ocean currents, including ocean lanes for passing ships at sea.

Maury was a descendant of the Maury family, a prominent Virginia family of Huguenot ancestry that can be traced back to 15th-century France. His grandfather (the Reverend James Maury) was an inspiring teacher to a future US president, Thomas Jefferson. Maury also had Dutch-American ancestry from the "Minor" family of early Virginia.  He was born in 1806 in Spotsylvania County, Virginia, near Fredericksburg; his parents were Richard Maury and Diane Minor Maury. The family moved to Franklin, Tennessee, when he was five. He wanted to emulate the naval career of his older brother, Flag Lieutenant John Minor Maury, who, however, caught yellow fever after fighting pirates as an officer in the US Navy. As a result of John's painful death, Matthew's father, Richard, forbade him from joining the Navy. Maury strongly considered attending West Point to get a better education than the Navy could offer at that time, but instead, he obtained a naval appointment through the influence of Tennessee Representative Sam Houston, a family friend, in 1825, at the age of 19.  Maury joined the Navy as a midshipman on board the frigate Brandywine which was carrying the Marquis de La Fayette home to France, following La Fayette's famous visit to the United States. Almost immediately, Maury began to study the seas and to record methods of navigation. One of the experiences that piqued this interest was a circumnavigation of the globe on the USS Vincennes, his assigned ship and the first US warship to travel around the world.
QUESTION:
What did he do after obtaining naval appointment?