Question: Who in the14th century introduced musical notation used where Jack later participated in a covert mission?

Context paragraphs:
paragraph_text: San Antonio Missions National Historical Park is a National Historical Park and part of a UNESCO World Heritage Site preserving four of the five Spanish frontier missions in San Antonio, Texas, USA. These outposts were established by Catholic religious orders to spread Christianity among the local natives. These missions formed part of a colonization system that stretched across the Spanish Southwest in the 17th, 18th, and 19th centuries.
title: San Antonio Missions National Historical Park
paragraph_text: Consistent with the missions and priorities outlined above, the Canadian Armed Forces also contribute to the conduct of Canadian defence diplomacy through a range of activities, including the deployment of Canadian Defence Attachés, participation in bilateral and multilateral military forums (e.g. the System of Cooperation Among the American Air Forces), ship and aircraft visits, military training and cooperation, and other such outreach and relationship-building efforts.
title: Canadian Armed Forces
paragraph_text: The main representatives of the new style, often referred to as ars nova as opposed to the ars antiqua, were the composers Philippe de Vitry and Guillaume de Machaut. In Italy, where the Provençal troubadours had also found refuge, the corresponding period goes under the name of trecento, and the leading composers were Giovanni da Cascia, Jacopo da Bologna and Francesco Landini. Prominent reformer of Orthodox Church music from the first half of 14th century was John Kukuzelis; he also introduced a system of notation widely used in the Balkans in the following centuries.
title: Late Middle Ages
paragraph_text: Some critics express the opinion that it is only from the mid-19th century, and especially in the 20th century, that the score began to hold such a high significance. Previously, improvisation (in preludes, cadenzas and ornaments), rhythmic flexibility (e.g., tempo rubato), improvisatory deviation from the score and oral tradition of playing was integral to the style. Yet in the 20th century, this oral tradition and passing on of stylistic features within classical music disappeared. Instead, musicians tend to use just the score to play music. Yet, even with the score providing the key elements of the music, there is considerable controversy about how to perform the works. Some of this controversy relates to the fact that this score-centric approach has led to performances that emphasize metrically strict block-rhythms (just as the music is notated in the score).
title: Classical music
paragraph_text: From 1901 to 1938 he was head of the prestigious Carlsberg Laboratory, Copenhagen. While working at the Carlsberg Laboratory he studied the effect of ion concentration on proteins, and because the concentration of hydrogen ions was particularly important, he introduced the pH-scale as a simple way of expressing it in 1909. The article in which he introduced the scale (using the notation pH) described two methods for measuring acidity which Sørensen and his students had refined. The first method was based on electrodes, whereas the second involved comparing the colours of samples and a preselected set of indicators.
title: S. P. L. Sørensen
paragraph_text: Historically, other notations, such as the vinculum, were similarly used for grouping; in present - day use, these notations all have specific meanings. The earliest use of brackets to indicate aggregation (i.e. grouping) was suggested in 1608 by Christopher Clavius and in 1629 by Albert Girard.
title: Bracket (mathematics)
paragraph_text: The CIA had different demands placed on it by the different bodies overseeing it. Truman wanted a centralized group to organize the information that reached him, the Department of Defense wanted military intelligence and covert action, and the State Department wanted to create global political change favorable to the US. Thus the two areas of responsibility for the CIA were covert action and covert intelligence. One of the main targets for intelligence gathering was the Soviet Union, which had also been a priority of the CIA's predecessors.
title: Central Intelligence Agency
paragraph_text: Indian astronomer and mathematician Aryabhata (476-550), in his Aryabhatiya (499) introduced a number of trigonometric functions (including sine, versine, cosine and inverse sine), trigonometric tables, and techniques and algorithms of algebra. In 628 AD, Brahmagupta suggested that gravity was a force of attraction. He also lucidly explained the use of zero as both a placeholder and a decimal digit, along with the Hindu-Arabic numeral system now used universally throughout the world. Arabic translations of the two astronomers' texts were soon available in the Islamic world, introducing what would become Arabic numerals to the Islamic World by the 9th century. During the 14th–16th centuries, the Kerala school of astronomy and mathematics made significant advances in astronomy and especially mathematics, including fields such as trigonometry and analysis. In particular, Madhava of Sangamagrama is considered the "founder of mathematical analysis".
title: History of science
paragraph_text: In 1981, the MUSE system was demonstrated for the first time in the United States, using the same 5:3 aspect ratio as the Japanese system. Upon visiting a demonstration of MUSE in Washington, US President Ronald Reagan was impressed and officially declared it "a matter of national interest" to introduce HDTV to the US.
title: High-definition television
paragraph_text: It is in this time that the notation of music on a staff and other elements of musical notation began to take shape. This invention made possible the separation of the composition of a piece of music from its transmission; without written music, transmission was oral, and subject to change every time it was transmitted. With a musical score, a work of music could be performed without the composer's presence. The invention of the movable-type printing press in the 15th century had far-reaching consequences on the preservation and transmission of music.
title: Classical music
paragraph_text: Jai Courtney as John ``Jack ''McClane, Jr., the son of the senior McClane and a CIA operative on a mission in Russia.
title: A Good Day to Die Hard
paragraph_text: The key characteristic of classical music that distinguishes it from popular music and folk music is that the repertoire tends to be written down in musical notation, creating a musical part or score. This score typically determines details of rhythm, pitch, and, where two or more musicians (whether singers or instrumentalists) are involved, how the various parts are coordinated. The written quality of the music has enabled a high level of complexity within them: J.S. Bach's fugues, for instance, achieve a remarkable marriage of boldly distinctive melodic lines weaving in counterpoint yet creating a coherent harmonic logic that would be impossible in the heat of live improvisation. The use of written notation also preserves a record of the works and enables Classical musicians to perform music from many centuries ago. Musical notation enables 2000s-era performers to sing a choral work from the 1300s Renaissance era or a 1700s Baroque concerto with many of the features of the music (the melodies, lyrics, forms, and rhythms) being reproduced.
title: Classical music
paragraph_text: Using his own system, Hampartsoum Limondjian transcribed most of 18th century Turkish music compositions in a collection of six books, which he presented to Selim III. Only two of the originals survive to date and are preserved at the Istanbul Municipal Conservatory Library. As the dominant notation for Turkish and Armenian music, the Hamparsum notation was instrumental in the transcription and survival of thousands of pieces of music, and was surpassed only in modern times in its use for Turkish classical music. The notation system is still in use by the Armenian Apostolic Church.
title: Hampartsoum Limondjian
paragraph_text: The Gorleston Psalter (British Library Manuscript Additional 49622) is a 14th-century manuscript notable for containing early music instruction and for its humorous marginalia.
title: Gorleston Psalter
paragraph_text: A CD player is an electronic device that plays audio compact discs, which are a digital optical disc data storage format. CD players were first sold to consumers in 1982. CDs typically contain recordings of audio material such as music. CD players are often a part of home stereo systems, car audio systems, and personal computers. With the exception of CD boomboxes, most CD players do not produce sound by themselves. Most CD players only produce an output signal via a headphone jack and / or RCA jacks. To listen to music using a CD player with a headphone output jack, the user plugs headphones or earphones into the headphone jack. To use a CD player in a home stereo system, the user connects an RCA cable to the RCA jacks or other outputs and connects it to a hi - fi (or other amplifier) and loudspeakers for listening to music. They are also manufactured as portable devices, which are battery powered and typically used with headphones.
title: CD player
paragraph_text: Melodifestivalen 1973 was the selection for the 14th song to represent Sweden at the Eurovision Song Contest. It was the 13th time that this system of picking a song had been used. 10 songwriters were selected by SVT for the competition. The final was broadcast on TV1 but was not broadcast on radio.
title: Melodifestivalen 1973
paragraph_text: The use of paper for hygiene has been recorded in China in the 6th century AD, with specifically manufactured toilet paper being mass - produced in the 14th century. Modern commercial toilet paper originated in the 19th century, with a patent for roll - based dispensers being made in 1883.
title: Toilet paper
paragraph_text: Season 1 begins at midnight on the day of the California presidential primary. Jack Bauer's protocol is to protect Senator David Palmer from an assassination plot and rescue his own family from those responsible, who seek retribution for Jack and Palmer's involvement with a covert American mission in the Balkans.
title: 24 (TV series)
paragraph_text: A number of writing systems have been used over the years for transcribing the language. Of these, the Somali alphabet is the most widely used, and has been the official writing script in Somalia since the government of former President of Somalia Mohamed Siad Barre formally introduced it in October 1972. The script was developed by the Somali linguist Shire Jama Ahmed specifically for the Somali language, and uses all letters of the English Latin alphabet except p, v and z. Besides Ahmed's Latin script, other orthographies that have been used for centuries for writing Somali include the long-established Arabic script and Wadaad's writing. Indigenous writing systems developed in the twentieth century include the Osmanya, Borama and Kaddare scripts, which were invented by Osman Yusuf Kenadid, Abdurahman Sheikh Nuur and Hussein Sheikh Ahmed Kaddare, respectively.
title: Somalis
paragraph_text: The Bâton à feu, or Baston à feu (French for "Fire stick"), is a type of hand cannon developed in the 14th century in Western Europe. This weapon type corresponds to the portable artillery of the second half of 14th century.
title: Bâton à feu

Reasoning steps:
Where did Jack participate in a covert mission? >>>> the Balkans
Who introduced a system of musical notation used in the the Balkans in the 14th century? >>>> John Kukuzelis

Answer: spans: John Kukuzelis