Problem: Background: Abner Doubleday (June 26, 1819 - January 26, 1893) was a career United States Army officer and Union general in the American Civil War. He fired the first shot in defense of Fort Sumter, the opening battle of the war, and had a pivotal role in the early fighting at the Battle of Gettysburg. Gettysburg was his finest hour, but his relief by Maj. Gen. George G. Meade caused lasting enmity between the two men.
Context: At the start of the Battle of Gettysburg, July 1, 1863, Doubleday's division was the second infantry division on the field to reinforce the cavalry division of Brigadier General John Buford. When his corps commander, Major General John F. Reynolds, was killed very early in the fighting, Doubleday found himself in command of the corps at 10:50 am. His men fought well in the morning, putting up a stout resistance, but as overwhelming Confederate forces massed against them, their line eventually broke and they retreated back through the town of Gettysburg to the relative safety of Cemetery Hill south of town. It was Doubleday's finest performance during the war, five hours leading 9,500 men against ten Confederate brigades that numbered more than 16,000. Seven of those brigades sustained casualties that ranged from 35 to 50 percent, indicating the ferocity of the Union defense. On Cemetery Hill, however, the I Corps could muster only a third of its men as effective for duty, and the corps was essentially destroyed as a combat force for the rest of the battle; it would be decommissioned in March 1864, its surviving units consolidated into other corps. On July 2, 1863, Army of the Potomac commander Maj. Gen. George G. Meade replaced Doubleday with Major General John Newton, a more junior officer from another corps. The ostensible reason was a false report by XI Corps commander Major General Oliver O. Howard that Doubleday's corps broke first, causing the entire Union line to collapse, but Meade also had a long history of disdain for Doubleday's combat effectiveness, dating back to South Mountain. Doubleday was humiliated by this snub and held a lasting grudge against Meade, but he returned to division command and fought well for the remainder of the battle. He was wounded in the neck on the second day of Gettysburg and received a brevet promotion to colonel in the regular army for his service. He formally requested reinstatement as I Corps commander, but Meade refused, and Doubleday left Gettysburg on July 7 for Washington. Doubleday's indecision as a commander in the war resulted in his uncomplimentary nickname "Forty-Eight Hours."
Question: who was his commanding officer?
Answer: Army of the Potomac commander Maj. Gen. George G. Meade

Problem: Background: Vaughan's father, Asbury "Jake" Vaughan, was a carpenter by trade and played guitar and piano. Her mother, Ada Vaughan, was a laundress and sang in the church choir. Jake and Ada Vaughan had migrated to Newark, New Jersey from Virginia during the First World War. Sarah was their only biological child, although in the 1960s they adopted Donna, the child of a woman who traveled on the road with Sarah Vaughan.
Context: In 1953, Treadwell negotiated a unique contract for Vaughan with Mercury Records. She would record commercial material for the Mercury label and more jazz-oriented material for its subsidiary EmArcy. Vaughan was paired with producer Bob Shad and their excellent working relationship yielded strong commercial and artistic success. Her debut Mercury recording session took place in February 1954 and she stayed with the label through 1959. After a stint at Roulette Records (1960 to 1963), Vaughan returned to Mercury from 1964 to 1967. Vaughan's commercial success at Mercury began with the 1954 hit, "Make Yourself Comfortable", recorded in the fall of 1954, and continued with a succession of hits, including: "How Important Can It Be" (with Count Basie), "Whatever Lola Wants", "The Banana Boat Song", "You Ought to Have A Wife" and "Misty". Her commercial success peaked in 1959 with "Broken Hearted Melody", a song she considered to be "corny", but, nonetheless, became her first gold record, and a regular part of her concert repertoire for years to come. Vaughan was reunited with Billy Eckstine for a series of duet recordings in 1957 that yielded the hit "Passing Strangers". Vaughan's commercial recordings were handled by a number of different arrangers and conductors, primarily Hugo Peretti and Hal Mooney. The jazz "track" of her recording career proceeded apace, backed either by her working trio or various combinations of stellar jazz players. One of her own favorite albums was a 1954 sextet date that included Clifford Brown. In the latter half of the 1950s she followed a schedule of almost non-stop touring, with many famous jazz musicians. She was featured at the first Newport Jazz Festival in the summer of 1954 and starred in subsequent editions of that festival at Newport and in New York City for the remainder of her life. In the fall of 1954, she performed at Carnegie Hall with the Count Basie Orchestra on a bill that also included Billie Holiday, Charlie Parker, Lester Young and the Modern Jazz Quartet. That fall, she again toured Europe successfully before embarking on a "Big Show" U.S. tour, a grueling succession of start-studded one-nighters that included Count Basie, George Shearing, Erroll Garner and Jimmy Rushing. At the 1955 New York Jazz Festival on Randalls Island, Vaughan shared the bill with the Dave Brubeck quartet, Horace Silver, Jimmy Smith, and the Johnny Richards Orchestra. Although the professional relationship between Vaughan and Treadwell was quite successful through the 1950s, their personal relationship finally reached a breaking point and she filed for a divorce in 1958. Vaughan had entirely delegated financial matters to Treadwell, and despite significant income figures reported through the 1950s, at the settlement Treadwell said that only $16,000 remained. The couple evenly divided the amount and their personal assets, terminating their business relationship.
Question: Are there any other interesting aspects about this article?
Answer:
Vaughan's commercial success at Mercury began with the 1954 hit, "Make Yourself Comfortable",