Question: What country is in the middle of the source of the warm moist air mass over the Andes Mountains in the country where El Alma de un tango's director holds citizenship?

<P0-S0> Although the centre and the eastern parts of the country are mostly flat, the west is mountainous. <P0-S1> Both the Andes and Sierras Pampeanas affect the climate of Argentina, leading to differences in temperature, pressure, and spatial distribution of precipitation depending on the topography and altitude. <P0-S2> Here, the Andes exert an important influence on the climate. <P0-S3> Owing to the higher altitudes of the Andes north of 40 S, they completely block the normal westerly flow, preventing low pressure systems containing moisture from the Pacific Ocean from coming in. <P0-S4> Thus, much of Argentina north of 40 S is dominated by wind circulation patterns from the South Atlantic High. <P0-S5> South of 40 S, the Andes are lower in altitude, allowing much of Patagonia to be dominated by westerly winds and air masses from the Pacific Ocean. <P0-S6> However, the north -- south orientation of the Andes creates a barrier for humid air masses originating from the Pacific Ocean. <P0-S7> This is because they force these air masses upwards, cooling adiabactically. <P0-S8> Most of the moisture is dropped on the Chilean side, causing abundant precipitation and cloudiness while on the Argentine side, the air warms adiabatically, causing it to become drier as it descends. <P0-S9> Thus, an extensive rain -- shadow is present in much of Patagonia, causing it to receive very little precipitation. <P0-S10> The Sierras Pampeanas influences the climate on a much smaller scale than the Andes. <SEP> <P1-S0> tropical and equatorial air masses are hot as they develop over lower latitudes. <P1-S1> those that develop over land (continental) are drier and hotter than those that develop over oceans, and travel poleward on the western periphery of the subtropical ridge. <P1-S2> maritime tropical air masses are sometimes referred to as trade air masses. <P1-S3> monsoon air masses are moist and unstable. <P1-S4> superior air masses are dry, and rarely reach the ground. <P1-S5> they normally reside over maritime tropical air masses, forming a warmer and drier layer over the more moderate moist air mass below, forming what is known as a trade wind inversion over the maritime tropical air mass. <P1-S6> continental polar air masses (cp) are air masses that are cold and dry due to their continental source region. <P1-S7> continental polar air masses that affect north america form over interior canada. <P1-S8> continental tropical air masses (ct) are a type of tropical air produced by the subtropical ridge over large areas of land and typically originate from low - latitude deserts such as the sahara desert in northern africa, which is the major source of these air masses. <P1-S9> other less important sources producing ct air masses are the arabian peninsula, the central arid / semi-arid part of australia and deserts lying in the southwestern united states. <P1-S10> continental tropical air masses are extremely hot and dry. <SEP> <P2-S0> the balkan mountains run laterally through the middle of the country. <P2-S1> the mountainous southwest has two distinct alpine ranges—rila and pirin, which border the lower but more extensive rhodope mountains to the east. <P2-S2> musala, at 2,925 metres (9,596 ft), is the highest point in both bulgaria and the balkan peninsula, and the black sea coast is the country's lowest point. <P2-S3> plains occupy about one third of the territory, while plateaux and hills occupy 41%. <P2-S4> most rivers are short and with low water levels. <P2-S5> the longest river located solely in bulgarian territory, the iskar, has a length of 368 kilometres (229 mi). <P2-S6> other major rivers include the struma and the maritsa in the south.bulgaria has a changeable climate, which results from being positioned at the meeting point of the mediterranean and continental air masses combined with the barrier effect of its mountains. <P2-S7> northern bulgaria averages 1 °c (1.8 °f) cooler, and registers 200 millimetres (7.9 in) more precipitation, than the regions south of the balkan mountains. <P2-S8> temperature amplitudes vary significantly in different areas. <P2-S9> the lowest recorded temperature is −38.3 °c (−36.9 °f), while the highest is 45.2 °c (113.4 °f). <P2-S10> precipitation averages about 630 millimetres (24.8 in) per year, and varies from 500 millimetres (19.7 in) in dobrudja to more than 2,500 millimetres (98.4 in) in the mountains. <P2-S11> continental air masses bring significant amounts of snowfall during winter. <SEP> <P3-S0> This ocean has most of the islands in the world. <P3-S1> There are about 25,000 islands in the Pacific Ocean. <P3-S2> The islands entirely within the Pacific Ocean can be divided into three main groups known as Micronesia, Melanesia and Polynesia. <P3-S3> Micronesia, which lies north of the equator and west of the International Date Line, includes the Mariana Islands in the northwest, the Caroline Islands in the center, the Marshall Islands to the west and the islands of Kiribati in the southeast. <SEP> <P4-S0> The Soul of a Tango (Spanish:El Alma de un tango) is a 1945 Argentine musical film directed and written by Julio Irigoyen and starring Héctor Palacios, Elisa Labardén and Lea Conti. <P4-S1> The film was part of the popular genre of tango films. <P4-S2> It premiered on 20 April 1945. <SEP> <P5-S0> Ceriani made almost 50 film appearances in Argentina between 1938 and 1959 appearing in films such as the 1942 Julio Irigoyen film "Academia El Tango Argentino".