Question: Who is both the author of "A Treatise on the Fundamental Principles of Violin Playing" as well as the father of Wolfgang Amadeus Mozart?

full_context: Document 1: 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".
Document 2: La cetra (Vivaldi): La cetra, Op. 9, is a set of twelve violin concertos by Antonio Vivaldi, published in 1727. All of them are for violin solo, strings, and basso continuo, except No. 9 in B flat, which features two solo violins. The set was named after the cetra, a lyre-like instrument, and was dedicated to Emperor Charles VI.
Document 3: Leopold Mozart: Johann Georg Leopold Mozart (November 14, 1719 – May 28, 1787) was a German composer, conductor, teacher, and violinist. Mozart is best known today as the father and teacher of Wolfgang Amadeus Mozart, and for his violin textbook "Versuch einer gründlichen Violinschule".
Document 4: Maria Anna Mozart: Maria Anna Walburga Ignatia Mozart (30 July 1751 – 29 October 1829), called Marianne and nicknamed "Nannerl", was a musician, the older sister of Wolfgang Amadeus Mozart and daughter of Leopold and Anna Maria Mozart.
Document 5: Classical violin in Cuba: The bowed string instruments have been always present in Cuba since its discovery, first as the viol or bowed vihuela and at a later time as the Italian violin. As other instruments and the culture in general, also the violin enjoyed in Cuba a period of great relevance during the 19th century. The violin was part of the instrumental ensembles that accompanied the Contradance and the Dance, the first Cuban musical genres, as well as other subsequent genres as the Danzón and the Cha cha cha. The violin also intoned some of the most beautiful melodies composed in Cuba, such as "La Bella Cubana" by José White. At all times, the Cuban violinists have been prominent representatives of the Cuban music throughout the entire world.
Document 6: Piano Concerto No. 19 (Mozart): The Piano Concerto No. 19 in F major, KV 459 by Wolfgang Amadeus Mozart was written at the end of 1784: Mozart's own catalogue of works records that it was completed on 11 December (works surrounding it in the Köchel catalogue are KV 458, the "Hunt" quartet and KV 464, the fifth of the Haydn set). It is occasionally known as the "second coronation concerto" on account of Mozart playing it on the occasion of the coronation of Leopold II in Frankfurt am Main in October 1790. The autograph is held by the Jagiellońska Library, Kraków. The first edition was produced by Johann Andre of Offenbach in 1794, and Breitkopf & Härtel produced an edition in 1800. Like most of Mozart's concertos it is in three movements:
Document 7: Mozart family grand tour: The Mozart family grand tour was a journey through western Europe, undertaken by Leopold Mozart, his wife Anna Maria, and their musically gifted children Maria Anna (Nannerl) and Wolfgang Amadeus from 1763 to 1766. At the start of the tour the children were aged eleven and seven respectively. Their extraordinary skills had been demonstrated during a visit to Vienna in 1762, when they had played before the Empress Maria Theresa at the Imperial Court. Sensing the social and pecuniary opportunities that might accrue from a prolonged trip embracing the capitals and main cultural centres of Europe, Leopold obtained an extended leave of absence from his post as deputy Kapellmeister to the Prince-Archbishop of Salzburg. Throughout the subsequent tour, the children's "Wunderkind" status was confirmed as their precocious performances consistently amazed and gratified their audiences.
Document 8: 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.
Document 9: Josef Mysliveček: Josef Mysliveček (9 March 1737 – 4 February 1781) was a Czech composer who contributed to the formation of late eighteenth-century classicism in music. Mysliveček provided his younger friend Wolfgang Amadeus Mozart with significant compositional models in the genres of symphony, Italian serious opera, and violin concerto; both Wolfgang and his father Leopold Mozart considered him an intimate friend from the time of their first meetings in Bologna in 1770 until he betrayed their trust over the promise of an operatic commission for Wolfgang to be arranged with the management of the Teatro San Carlo in Naples. He was close to the Mozart family, and there are frequent references to him in the Mozart correspondence.
Document 10: Bows for Musical Instruments of the Violin Family: Bows for Musical Instruments of the Violin Family is a seminal luthier reference book compiled by the late Chicago violinist Joseph H. Roda (1894–1963) and published in 1959 by William Lewis and Son of Chicago. The book is about bows and bow makers and includes detailed illustrations prepared by Gladys Mickel Bell (1901–1992). Roda had been a violinist with the Chicago Grand Opera Company from 1933 to 1935 and a violist with the Chicago Symphony from 1936 to 1956 Bell, at the time, was a violinist, cellist, music educator, and sales person at William Lewis and Son.
Document 11: Versuch einer gründlichen Violinschule: Versuch einer gründlichen Violinschule ("A Treatise on the Fundamental Principles of Violin Playing") is a textbook for instruction in the violin, published by Leopold Mozart in 1756. The work was influential in its day, and continues to serve as a scholarly source concerning 18th century performance practice.
Document 12: Violin Sonata in D major (attributed to Mozart): The Violin Sonata in D major, K. deest, is a composition for violin and piano (or harpsichord) published in England during the 18th Century under the name of Wolfgang Amadeus Mozart. It is typical of many such works intended for use by amateur musicians in a domestic setting, with the attribution to a well known composer being used to boost sales. As with Mozart's earliest violin sonatas, the keyboard instrument is dominant.
Document 13: 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.
Document 14: Nannerl Notenbuch: The Nannerl Notenbuch , or Notenbuch für Nannerl (English: Nannerl's Music Book) is a book in which Leopold Mozart, from 1759 to about 1764, wrote pieces for his daughter, Maria Anna Mozart (known as "Nannerl"), to learn and play. His son Wolfgang also used the book, in which his earliest compositions were recorded (some penned by his father). The book contains simple short keyboard (typically harpsichord) pieces, suitable for beginners; there are many anonymous minuets, some works by Leopold, and a few other composers including Carl Philipp Emanuel Bach and the Austrian composer Georg Christoph Wagenseil. There are also some technical exercises, a table of intervals, and some modulating figured basses. The notebook originally contained 48 bound pages of music paper, but only 36 pages remain, with some of the missing 12 pages identified in other collections.
Document 15: Pietro Antonio Lorenzoni: Pietro Antonio Lorenzoni (1721–1782) was an Italian painter who is believed to have painted several portraits of Wolfgang Amadeus Mozart and his family: "The Boy Mozart" (1763), his sister Maria Anna Mozart in "Nannerl as a Child" (1763) and a portrait of their father Leopold Mozart (c. 1765). He arrived in Salzburg, Austria in the 1740s and first wanted to paint Wolfgang and Nannerl. His protégé, Johann Nepomuk della Croce, painted a Mozart family portrait in 1780.
ground_truth: Leopold Mozart