Question: Who became the leader of the country where 66 people the Soviets did not want to engage in conflict were held hostage for 444 days in the late 1970s?

full_context: Document 1: Korean War: Although Kim's early successes had led him to predict that he would end the war by the end of August, Chinese leaders were more pessimistic. To counter a possible U.S. deployment, Zhou Enlai secured a Soviet commitment to have the Soviet Union support Chinese forces with air cover, and deployed 260,000 soldiers along the Korean border, under the command of Gao Gang. Zhou commanded Chai Chengwen to conduct a topographical survey of Korea, and directed Lei Yingfu, Zhou's military advisor in Korea, to analyze the military situation in Korea. Lei concluded that MacArthur would most likely attempt a landing at Incheon. After conferring with Mao that this would be MacArthur's most likely strategy, Zhou briefed Soviet and North Korean advisers of Lei's findings, and issued orders to Chinese army commanders deployed on the Korean border to prepare for American naval activity in the Korea Strait.
Document 2: Korean War: On 18 September, Stalin dispatched General H. M. Zakharov to Korea to advise Kim Il-sung to halt his offensive around the Pusan perimeter and to redeploy his forces to defend Seoul. Chinese commanders were not briefed on North Korean troop numbers or operational plans. As the overall commander of Chinese forces, Zhou Enlai suggested that the North Koreans should attempt to eliminate the enemy forces at Inchon only if they had reserves of at least 100,000 men; otherwise, he advised the North Koreans to withdraw their forces north.
Document 3: Iranian Embassy siege: The Iranian Embassy siege took place from 30 April to 5 May 1980, after a group of six armed men stormed the Iranian embassy in South Kensington, London. The gunmen, members of an Iranian Arab group campaigning for Arab national sovereignty in the southern Iranian region of Khuzestan Province, took 26 people hostage -- mostly embassy staff, but also several visitors as well as a police officer who had been guarding the embassy. They demanded the release of Arab prisoners from prisons in Khuzestan and their own safe passage out of the United Kingdom. Margaret Thatcher's government quickly resolved that safe passage would not be granted, and a siege ensued. Over the following days, police negotiators secured the release of five hostages in exchange for minor concessions, such as the broadcasting of the hostage - takers' demands on British television.
Document 4: Hossein Fatemi: Hossein Fatemi (10 February 1917 – 10 November 1954) was a scholar, journalist, and famous politician of Iran. A close associate of Prime Minister Mohammad Mosaddegh, he proposed nationalization of Iranian oil and gas assets. Initially a journalist, he served as Foreign Affairs Minister of Iran from 1951 to 1953. After the 1953 CIA-orchestrated coup d'état toppled the democratically elected government of Mosaddegh, Fatemi was arrested, tortured, and convicted by a military court of "treason against the Shah", and executed by a firing squad.
Document 5: Embassy of the United States, Tehran: The Embassy of the United States of America in Tehran was the United States of America's diplomatic mission in the Imperial State of Iran. Direct bilateral diplomatic relations between the two governments were severed following the Iranian Revolution in 1979, and the subsequent seizure of the embassy in November 1979.
Document 6: Iran: On November 4, 1979, a group of students seized the United States Embassy and took the embassy with 52 personnel and citizens hostage, after the United States refused to return Mohammad Reza Pahlavi to Iran to face trial in the court of the new regime. Attempts by the Jimmy Carter administration to negotiate for the release of the hostages, and a failed rescue attempt, helped force Carter out of office and brought Ronald Reagan to power. On Jimmy Carter's final day in office, the last hostages were finally set free as a result of the Algiers Accords.
Document 7: Mohammad Mosaddegh: Mohammad Mosaddegh (Persian: محمد مصدق ‎ ‎; IPA: (mohæmˈmæd (- e) mosædˈdeɣ) (listen); 16 June 1882 -- 5 March 1967), was an Iranian politician. He was the head of a democratically elected government, holding office as the Prime Minister of Iran from 1951 until 1953, when his government was overthrown in a coup d'état aided by the United States' Central Intelligence Agency and the United Kingdom's Secret Intelligence Service.
Document 8: Shaban Jafari: Shaban Jafari () (born 1921 in Tehran – died 2006 in Santa Monica, California) often known as Shaban Bimokh (, "Shaban the Brainless") was an Iranian political figure and practitioner of varzesh-e bastani. A controversial figure in politics, he was instrumental in overthrowing Prime Minister Mohammad Mossadegh's government in 1953 Iranian coup d'état.
Document 9: 1953 Iranian coup d'état: The 1953 Iranian coup d'état, known in Iran as the 28 Mordad coup d'état (), was the overthrow of the democratically elected Prime Minister Mohammad Mosaddegh in favour of strengthening the monarchical rule of Mohammad Reza Pahlavi on 19 August 1953, orchestrated by the United States (under the name "TPAJAX" Project or "Operation Ajax") and the United Kingdom (under the name "Operation Boot"). It was the first covert action of the United States to overthrow a foreign government during peacetime.
Document 10: All the Shah's Men: All the Shah's Men: An American Coup and the Roots of Middle East Terror is a book written by American journalist Stephen Kinzer. The book discusses the 1953 Iranian coup d'état backed by the U.S. Central Intelligence Agency (CIA) in which Mohammed Mossadegh, Iran's prime minister, was overthrown by Islamists supported by American and British agents (chief among them Kermit Roosevelt) and royalists loyal to Shah Mohammad Reza Pahlavi.
Document 11: South Korea: On June 25, 1950, North Korea invaded South Korea, sparking the Korean War, the Cold War's first major conflict, which continued until 1953. At the time, the Soviet Union had boycotted the United Nations (UN), thus forfeiting their veto rights. This allowed the UN to intervene in a civil war when it became apparent that the superior North Korean forces would unify the entire country. The Soviet Union and China backed North Korea, with the later participation of millions of Chinese troops. After an ebb and flow that saw both sides almost pushed to the brink of extinction, and massive losses among Korean civilians in both the north and the south, the war eventually reached a stalemate. The 1953 armistice, never signed by South Korea, split the peninsula along the demilitarized zone near the original demarcation line. No peace treaty was ever signed, resulting in the two countries remaining technically at war. Over 1.2 million people died during the Korean War.
Document 12: Eric Parnes: In January 2014, the Ayyam Gallery premiered at their DIFC location in Dubai an exhibition of Eric Parnes' photographs of the remaining interiors of the Former Embassy of Iran in Washington, D.C. The building has been "long and abandoned", and still is, shuttered and inaccessible in over three decades since its closure circa 1979-1980 with the Iranian Revolution and the resulting severance of dialogue with the United States due to the Iran Hostage Crisis . Parnes' imagery showcases the remaining visual legacy of the Embassy, renowned for its active social presence in the 1960s and 1970s as an immensely popular party destination in Washington, D.C. under the leadership of then-Ambassador Ardeshir Zahedi, who was interviewed during the exhibition about Parnes stating “We have had a long friendship,” he said. “Iran and the U.S., they need each other. They may be friends; they must be friends.”. Frequent political and celebrity guests included Barbra Streisand, Elizabeth Taylor, Frank Sinatra, Sen. Edward "Ted" Kennedy, Secretary of State Henry Kissinger and Andy Warhol.Barbara Walters wrote: "The number one embassy when it came to extravagance and just plain enjoyment was the Iranian Embassy." Parnes' stylized photographs, on the other hand, now show an empty, dark building yet that still holds remarkably preserved elements of elaborate Persian mosaics and mirrored rooms amidst the general decay.
Document 13: Korean War: In a series of emergency meetings that lasted from 2–5 October, Chinese leaders debated whether to send Chinese troops into Korea. There was considerable resistance among many leaders, including senior military leaders, to confronting the U.S. in Korea. Mao strongly supported intervention, and Zhou was one of the few Chinese leaders who firmly supported him. After Lin Biao politely refused Mao's offer to command Chinese forces in Korea (citing his upcoming medical treatment), Mao decided that Peng Dehuai would be the commander of the Chinese forces in Korea after Peng agreed to support Mao's position. Mao then asked Peng to speak in favor of intervention to the rest of the Chinese leaders. After Peng made the case that if U.S. troops conquered Korea and reached the Yalu they might cross it and invade China the Politburo agreed to intervene in Korea. Later, the Chinese claimed that US bombers had violated PRC national airspace on three separate occasions and attacked Chinese targets before China intervened. On 8 October 1950, Mao Zedong redesignated the PLA North East Frontier Force as the Chinese People's Volunteer Army (PVA).
Document 14: Korean War: In April 1950, Stalin gave Kim permission to invade the South under the condition that Mao would agree to send reinforcements if they became needed. Stalin made it clear that Soviet forces would not openly engage in combat, to avoid a direct war with the Americans. Kim met with Mao in May 1950. Mao was concerned that the Americans would intervene but agreed to support the North Korean invasion. China desperately needed the economic and military aid promised by the Soviets. At that time, the Chinese were in the process of demobilizing half of the PLA's 5.6 million soldiers. However, Mao sent more ethnic Korean PLA veterans to Korea and promised to move an army closer to the Korean border. Once Mao's commitment was secured, preparations for war accelerated.
Document 15: Iran hostage crisis: The Iran hostage crisis was a diplomatic standoff between Iran and the United States of America. Fifty - two American diplomats and citizens were held hostage for 444 days from November 4, 1979, to January 20, 1981, after a group of Iranian college students belonging to the Muslim Student Followers of the Imam's Line, who supported the Iranian Revolution, took over the U.S. Embassy in Tehran. It stands as the longest hostage crisis in recorded history.
ground_truth: Mohammad Mosaddegh
sub_queries: Who did the Soviets not want to engage in conflict? Answer: the Americans
where were 66 the Americans held hostage for 444 days in the late 1970s Answer: Iran
who became the leader of Iran in 1951 Answer: Mohammad Mosaddegh