In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.

Passage: The yellowhammer is a conspicuous, vocal and formerly common country bird, and has attracted human interest. Yellowham Wood and Yellowham Hill, near Dorchester, both derive their names from the bird. Robbie Burns' poem "The Yellow, Yellow Yorlin'" gets its title from a Scottish name for the yellowhammer, which is given an obvious sexual connotation: I met a pretty maid, an' unto her I said,/ "I wad fain fin' your yellow, yellow yorlin'." More factual descriptions of the bird and its behaviour can be found in John Clare's "The Yellowhammer's Nest" and "The Yellowhammer", whose final lines read:
Enid Blyton helped to popularise the bird's song as "little bit of bread and no cheese" in books such as The Ship of Adventure and Five Go Off in a Caravan, and wrote a poem called "The Yellow-hammer".
Beethoven's student, Carl Czerny, and biographer Anton Schindler, both suggested that the composer got the idea for the first four notes of his 5th symphony from the yellowhammer's call, although it is more likely that the opening of the 4th Piano Concerto was actually the work in question. Beethoven also used the yellowhammer theme in two piano sonatas, no. 21 in C major (the "Waldstein", Op.53) and No. 23 in F minor (the "Appassionata", Op.57).Olivier Messiaen often used birdsong as an inspiration for his music, and the yellowhammer features in Chronochromie, Catalogue d'oiseaux, La fauvette des jardins and Méditations sur le mystère de la Sainte Trinité, appearing in four movements of the last piece.An old legend links the yellowhammer to the Devil. Its tongue was supposed to bear a drop of his blood, and the intricate pattern on the eggs was said to carry a concealed, possibly evil, message; these satanic associations sometimes led to the persecution of the bird. The unusual appearance of the eggs also led to "scribble lark", an old name for the bird. 
Question: What are the names of the two piano sonatas Beethoven used the yellowhammer theme in?
no. 21 in C major.

Passage: The Tang dynasty was largely a period of progress and stability in the first half of the dynasty's rule, until the devastating An Lushan Rebellion (755-763) and the decline of central authority in the later half of the dynasty. Like the previous Sui dynasty, the Tang dynasty maintained a civil-service system by recruiting scholar-officials through standardized examinations and recommendations to office.  The rise of regional military governors known as jiedushi during the 9th century undermined this civil order.  Chinese culture flourished and further matured during the Tang era; it is traditionally considered the greatest age for Chinese poetry.  Two of China's most famous poets, Li Bai and Du Fu, belonged to this age, as did many famous painters such as Han Gan, Zhang Xuan, and Zhou Fang.  Scholars of this period compiled a rich variety of historical literature, as well as encyclopedias and geographical works. The adoption of the title Tängri Qaghan by the Tang Emperor Taizong in addition to his title as emperor was eastern Asia's first "simultaneous kingship".Many notable innovations occurred under the Tang, including the development of woodblock printing.  Buddhism became a major influence in Chinese culture, with native Chinese sects gaining prominence.  However, in the 840s the Emperor Wuzong of Tang enacted policies to persecute Buddhism, which subsequently declined in influence. Although the dynasty and central government had gone into decline by the 9th century, art and culture continued to flourish. The weakened central government largely withdrew from managing the economy, but the country's mercantile affairs stayed intact and commercial trade continued to thrive regardless. However, agrarian rebellions in the latter half of the 9th century resulted in damaging atrocities such as the Guangzhou massacre of 878–879. 
Question: Under what dynasty were the jiedushi created?
Tang dynasty.

Passage: Among his fellow musicians, Szigeti was widely admired and respected. Violinist Nathan Milstein wrote that Szigeti... was an incredibly cultured musician. Actually his talent grew out of his culture ... I always admired him, and he was respected by musicians ... in his late years, he finally got the appreciation he deserved from the general public as well.
In his memoirs, published in 2004, cellist János Starker asserts that Szigeti was one of the giants among the violinists I had heard from childhood on, and my admiration for him is undiminished up to this day.
Starker then describes a recital he attended late in Szigeti's career, illustrating both the extent to which Szigeti was suffering from arthritis and his ability to still communicate his musical ideas effectively: 
"He invited me to his recital in Town Hall ... the first few minutes were excruciating: as I saw later, his fingers had deteriorated to the point that he had almost no flesh on them. But once he loosened up a bit he produced heart-rending beauty.
Violinist Yehudi Menuhin comments at length about Szigeti in his own memoirs, remarking as many others did on Szigeti's intellectual approach to music, but in a somewhat more critical fashion:
Apart from Enesco, he was the most cultivated violinist I have ever known but while Enesco was a force of nature, Szigeti, slender, small, anxious, was a beautifully fashioned piece of porcelain, a priceless Sèvres vase. Curiously for a Hungarian, from whom one expects wild, energetic, spontaneous qualities, Szigeti travelled even farther up a one-way road of deliberate intellectualism. A young accompanist who worked with Szigeti told me that two hours concentration wouldn't get them beyond the first three bars of a sonata--so much analysis and ratiocination went into his practice ... A similar persnicketiness marked his adjudication. Shortly before he died in 1973, he was a member of our jury at the City of London Carl Flesch Concours ... I was struck not only by the sharpness of his intellect but also by what seemed to me the perversity of his opinions. Some particular aspect of a competitor's playing would hold his attention, and he would take violent issue with it, to the exclusion of everything else. For him a violinist was made or broken, a prize awarded or withheld, on details that to me scarcely mattered.
Nevertheless, Menuhin too referred to Szigeti as "a violinist whom I much admired and a man of whom I was very fond". 
Question: What is the last name of the violinist that the man suffering from arthritis was compared to by Yehudi Menuhin?

Enesco.