Question: Giacomo Meyerbeer and Wolfgang Amadeus Mozart shared what occupation?

Context paragraphs:
Aaron Halle-Wolfssohn: Aaron Halle-Wolfssohn (1754 or 1756, in probably Halle – 20 March 1835, in Fürth) was a German Jew, a translator and commentator of the "Tanakh" and a leading writer of the "Haskalah" (the Jewish Enlightenment).  He was born in Halle and died in Fürth.  He was professor at the Königliche Wilhelmsschule at Breslau from 1792 to 1807.  After 1807, private professor in Berlin of the Meyerbeer brothers, and Giacomo Meyerbeer in particular.  Some letters between Giacomo Meyerbeer and Aron Wolfssohn were published among the Meyerbeer correspondence.

Franz Xaver Wolfgang Mozart: Franz Xaver Wolfgang Mozart (26 July 1791 – 29 July 1844), also known as Wolfgang Amadeus Mozart, Jr., was the youngest child of six born to Wolfgang Amadeus Mozart and his wife Constanze.  He was the younger of his parents' two surviving children.  He was a composer, pianist, conductor, and teacher from the late classical period whose musical style was of an early Romanticism, heavily influenced by his father's mature style.

Johann Nepomuk Beck: Johann Nepomuk Beck (5 May 1827 – 9 April 1904) was a Hungarian operatic baritone.  He possessed a flexible and strong voice that was particularly suited to the French and Italian operatic repertoire.  Beginning in 1853, he sang for more than thirty years at the Hofoper (now the Vienna State Opera), particularly excelling in works by Giacomo Meyerbeer, Wolfgang Amadeus Mozart, and Giuseppe Verdi.  He notably portrayed the role of King Solomon in the world première of Karl Goldmark’s "Die Königin von Saba" in 1875.

Wolfgang Amadeus Mozart: Wolfgang Amadeus Mozart ( ; ; ] ; 27 January 1756 – 5 December 1791), baptised as Johannes Chrysostomus Wolfgangus Theophilus Mozart, was a prolific and influential composer of the Classical era.

Amadeus (film): Amadeus is a 1984 American period drama film directed by Miloš Forman, adapted by Peter Shaffer from his stage play "Amadeus".  The story, set in Vienna, Austria, during the latter half of the 18th century, is a fictionalized biography of Wolfgang Amadeus Mozart.  Mozart's music is heard extensively in the soundtrack of the movie.  The film follows Italian composer Antonio Salieri at the court of Emperor Joseph II, and his jealous vendetta against his younger rival, Wolfgang Amadeus Mozart.

Neue Mozart-Ausgabe: The Neue Mozart-Ausgabe (abbreviated as "NMA"; in English, "New Mozart Edition") is the second complete works edition of the music of Wolfgang Amadeus Mozart.  A longer and more formal title for the edition is "Wolfgang Amadeus Mozart.  Neue Ausgabe sämtlicher Werke."

Giacomo Meyerbeer: Giacomo Meyerbeer (born Jacob Liebmann Beer; 5 September 1791 – 2 May 1864) was a German opera composer of Jewish birth who has been described as perhaps the most successful stage composer of the nineteenth century.  With his 1831 opera "Robert le diable" and its successors, he gave the genre of grand opera 'decisive character'.  Meyerbeer's grand opera style was achieved by his merging of German orchestra style with Italian vocal tradition.  These were employed in the context of sensational and melodramatic libretti created by Eugène Scribe and were enhanced by the up-to-date theatre technology of the Paris Opéra.  They set a standard which helped to maintain Paris as the opera capital of the nineteenth century.

Alte Mozart-Ausgabe: The Alte Mozart-Ausgabe is the name by which the first complete edition of the music of Wolfgang Amadeus Mozart, is known nowadays, published by Breitkopf & Härtel from January 1877 to December 1883, with supplements published until 1910.  The name "Alte Mozart-Ausgabe" (abbreviated "AMA") is actually a modern invention to distinguish the edition from the second Mozart complete works edition, the "Neue Mozart-Ausgabe"; the publication title of Breitkopf & Härtel's edition was "Wolfgang Amadeus Mozarts Werke.  Kritisch durchgesehene Gesammtausgabe."  (It is therefore sometimes referred to as the ""Mozart Gesammtausgabe"".)

Köchel catalogue: "This is a mostly complete list of the works of Wolfgang Amadeus Mozart, according to the sixth edition of the Köchel catalogue.  For a selective list of his works, grouped by genre, see List of compositions by Wolfgang Amadeus Mozart".

Constanze Mozart: Maria Constanze Cäcilia Josepha Johanna Aloysia Mozart (née Weber) (5 January 1762 – 6 March 1842) was an Austrian woman who trained as a singer.  She married twice, her first husband being Wolfgang Amadeus Mozart, and was later, jointly with her second husband Georg Nikolaus von Nissen, Mozart's biographer.  She and Mozart had six children, Karl Thomas Mozart, Franz Xaver Wolfgang Mozart, and four who died in infancy.

Supporting paragraphs: Giacomo Meyerbeer Wolfgang Amadeus Mozart
Answer: composer