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: During Leopold's illness performances were impossible, so Wolfgang turned to composition. According to the writer and musician Jane Glover, Wolfgang was inspired to write symphonies after meeting Johann Christian Bach. It is not clear when this meeting occurred, or when Wolfgang first heard J. C. Bach's symphonies, although he had played the older composer's harpsichord works in his May 1764 royal recital. Wolfgang soon completed his Symphony No. 1 in E flat, K. 16, and started his No. 4 in D major, K. 19 (which Zaslaw concludes was more likely composed, or at least completed, in The Hague). The D major symphony has, in Hildesheimer's words, "an originality of melody and modulation which goes beyond the routine methods of his [grown-up] contemporaries". These are Wolfgang's first orchestral writings, although Zaslaw hypothesises a theoretical "Symphony No. 0" from sketches in Wolfgang's musical notebook. Three lost symphonies, identified in the Köchel catalogue of Mozart's works only by their incipits (first few bars of music), may also have originated from the London period. Other works composed by Wolfgang in London include several instrumental sonatas, the jewel of which, according to Hildesheimer, is the C major sonata for piano, four hands, K. 19d. A set of violin sonatas, with extra flute and cello parts, was dedicated to Queen Charlotte at her request, and presented to her with an appropriate inscription in January 1765. Wolfgang also wrote his first vocal works, the motet "God is our Refuge", K. 20, and the tenor aria Va, dal furor portata, K. 21. 
Question: What was the last name of the older composer who Wolfgang played their harpsichord works in his May 1764 royal recital?
Bach.

Passage: Both Surfer Rosa and Steve Albini's production of the album have been influential on alternative rock, and on grunge in particular. Nirvana's Kurt Cobain cited Surfer Rosa as the basis for Nevermind's songwriting. When he first heard the album, Cobain discovered a template for the mix of heavy noise and pop he was aiming to achieve. He remarked in 1992 that he "heard songs off of Surfer Rosa that I'd written but threw out because I was too afraid to play them for anybody." Cobain hired Albini to produce Nirvana's 1993 album In Utero, primarily due to his contribution to Surfer Rosa. The Smashing Pumpkins' Billy Corgan described Surfer Rosa as "the one that made me go, 'holy shit'. It was so fresh. It rocked without being lame." Corgan was impressed by the album's drum sound, and acknowledged that The Smashing Pumpkins used to study the record for its technical elements. Musician PJ Harvey said that Surfer Rosa "blew my mind," and that she "immediately went to track down Steve Albini." Cobain listed Surfer Rosa as number 2 of the top 50 albums he thought were most influential to Nirvana's sound in his journal in 1993.People connected with the band were impressed by the record. Ivo Watts-Russell recalled: "I remember when I first heard Surfer Rosa thinking, 'I didn't know the Pixies could sound like The Fall.' That was my immediate reaction, in other words, incredibly raw." Gary Smith, who at the time was in a disagreement with the band, admitted he "was really happy that they had made such a forceful, aggressive, record." Dinosaur Jr.'s J Mascis, comparing the record to the later Pixies albums Bossanova and Trompe le Monde, said he thought that Steve Albini's production "sounded way better than the other ones."In 1991, as Pixies were recording Trompe le Monde, Albini described his impressions of Pixies during the recording of Surfer Rosa to the fan magazine Forced Exposure: "A patchwork pinch loaf from a band who at their top dollar best are blandly entertaining college rock. Their willingness to be 'guided' by their manager, their record company and their producers is unparalleled. Never have I seen four cows more anxious to be led around by their nose rings." Albini later apologized for his remarks, saying, "to this day I regret having done it. I don't think that I regarded the band as significantly as I should have.". 
Question: What is the first name of the person who was hired for their work with Surfer Rosa?
Steve.

Passage: A musician named Dixie Dwyer begins working with mobsters to advance his career but falls in love with the girlfriend of gangland kingpin Dutch Schultz.
A dancer from Dixie's neighborhood, Sandman Williams, is hired with his brother by the Cotton Club, a jazz club where most of the performers are black and the customers white. Owney Madden, a mobster, owns the club and runs it with his right-hand man, Frenchy.
Dixie becomes a Hollywood film star, thanks to the help of Madden and the mob but angering Schultz. He also continues to see Schultz's moll, Vera Cicero, whose new nightclub has been financed by the jealous gangster.
In the meantime, Dixie's ambitious younger brother Vincent becomes a gangster in Schultz's mob and eventually a public enemy, holding Frenchy as a hostage.
Sandman alienates his brother Clay at the Cotton Club by agreeing to perform a solo number there. While the club's management interferes with Sandman's romantic interest in Lila, a singer, its cruel treatment of the performers leads to an intervention by Harlem criminal "Bumpy" Rhodes on their behalf.
Dutch Schultz is violently dealt with by Madden's men while Dixie and Sandman perform on the Cotton Club's stage. 
Question: How does the dancer know Clay?

his brother.