Question: The String Quartet No. 14 in A-flat major was the last string quartet completed by the second Czech composer to achieve what?

Context articles: Martinů Quartet
String Quartet No. 13 (Dvořák)
Orford String Quartet
String Quartet No. 6 (Bartók)
Antonín Dvořák
String Quartet No. 14 (Dvořák)
Jasper String Quartet
Fanny Mendelssohn Quartet
String Quartets (Schoenberg)
Ezequiel Viñao

The Martinů Quartet (Czech: "Kvarteto Martinů" ) is a Czech string quartet ensemble founded in 1976, originally under the name "Havlák Quartet" by students of Professor Viktor Moučka at the Prague Conservatory.
 In 1985, with the approval of the Bohuslav Martinů Foundation, the quartet assumed its present name "Martinů Quartet", pledging to promote the chamber music of Czech composer Bohuslav Martinů.
 The quartet specialises in the works of Czech composers such as Smetana, Dvořák and Janáček, and especially the works of Bohuslav Martinů.
 They perform regularly at the Prague Spring Festival as well as concerts in many European Countries, the United States, Canada and Japan.
 The quartet also teaches chamber music performance at two annual chamber music workshops in the Czech Republic, which are open to both amateur and professional musicians.
Antonín Dvořák composed his String Quartet No. 13 in G major, Op.
 106, (B. 192), between November and December 9, 1895.
 1895 was an eventful year for him: he returned to Europe from America and his sister-in-law and first love both died.
 Upon finishing the String Quartet No. 13 in G major, he took back up his fourteenth in A-flat major, which he had begun before this quartet and finished it on December 30 of that year.
 The fourteenth quartet was published with the opus number 105.
The Orford String Quartet was a Canadian string quartet active from 1965 through 1991.
 They came to be the leading string quartet in Canada, and one of the finest in the world.
 "For 26 years, the Orford String Quartet was the best of its breed in Canada."
The String Quartet No. 6, Sz.
 114, BB 119, was the final string quartet that Béla Bartók wrote before his death.
 It was begun in August 1939 in Saanen, Switzerland, where Bartók was a guest of his patron, the conductor Paul Sacher.
 Shortly after he completed the Divertimento for String Orchestra on the 17th, he started on a commission for his friend, the violinist Zoltán Székely.
 Székely was acting as intermediary for the "New Hungarian Quartet", who had given the Budapest premiere of the String Quartet No. 5.
 With the outbreak of World War II and his mother's illness, Bartók returned to Budapest, where the quartet was finished in November.
 After his mother's death, Bartók decided to leave with his family for the United States.
 Due to the difficulties of the war, communication between Bartók and Székely was difficult, and the quartet was not premiered until 20 January 1941, when the Kolisch Quartet, to whom the work is dedicated, gave its premiere at the Town Hall in New York City.
Antonín Leopold Dvořák ( ; ] ; 8 September 1841 – 1 May 1904) was a Czech composer.
 After Bedřich Smetana, he was the second Czech composer to achieve worldwide recognition.
 Following Smetana's nationalist example, Dvořák frequently employed aspects, specifically rhythms, of the folk music of Moravia and his native Bohemia.
 Dvořák's own style has been described as "the fullest recreation of a national idiom with that of the symphonic tradition, absorbing folk influences and finding effective ways of using them."
The String Quartet No. 14 in A-flat major, op.
 105, B. 193, was the last string quartet completed by Antonín Dvořák, even though it was published before his Thirteenth Quartet (which appeared with the higher opus number 106).
 Dvořák finished his Fourteenth Quartet in 1895, when he had returned to Bohemia after his visit to America.
 The gestation of the Quartet had actually begun in America and lasted six months, which was rather protracted for the composer.
 This Quartet marked an important point in Dvořák's development because he would devote himself almost exclusively to writing explicit program music, namely symphonic poems and operas, afterwards.
The Jasper String Quartet is a professional string quartet based in Philadelphia, Pennsylvania.
 Currently the Ensemble in Residence at Temple University's Center for Gifted Young Musicians, the quartet was previously the Quartet in Residence at Oberlin Conservatory (from 2010-2012).
 Formed in 2004 while its members were in school at Oberlin Conservatory, the quartet completed string quartet master's programs at Rice University (2006-2008) and Yale University (2008-2010).
 The group's primary mentors are James Dunham, Norman Fischer and the Tokyo String Quartet.
 In 2010, they joined the roster of Astral Artists.
The Munich Fanny Mendelssohn String Quartet, Renate Eggebrecht 1st violin, Mario Korunic 2nd violin, Stefan Berg viola, Friedemann Kupsa violoncello, was founded in 1989 in the occasion of the performance and publication of Fanny Mendelssohn-Hensel's String Quartet in E-flat major and Piano Quartet in A-flat major at the Gasteig/Munich.
The Austrian composer Arnold Schoenberg published four string quartets, distributed over his lifetime.
 These were the String Quartet No. 1 in D minor, Op. 7 (1905), String Quartet No. 2 in F sharp minor, Op. 10 (1908), String Quartet No. 3, Op. 30 (1927), and the String Quartet No. 4, Op. 37 (1936).
Ezequiel Viñao (born 1960 in Buenos Aires) is an Argentine-American composer.
 He emigrated to the United States in 1980 and studied at the Juilliard School.
 His compositions include "La Noche de las Noches" (1989) for string quartet and electronics, which won First Prize at UNESCO's Latin-American Rostrum of Composers in 1993; six "Études" (1993) for piano solo, which were awarded a Kennedy Center Friedheim Award in 1995; a second string quartet "The Loss and the Silence" (2004), commissioned by the Juilliard String Quartet; "The Wanderer" (2005) for a cappella voices, commissioned by Chanticleer and Chicago a cappella, and "Sirocco Dust" (2009), commissioned by the Library of Congress for the St. Lawrence String Quartet.
 He currently resides in New York City.