Input: Article: "Hellenistic" is a modern word and a 19th-century concept; the idea of a Hellenistic period did not exist in Ancient Greece. Although words related in form or meaning, e.g. Hellenist (Ancient Greek: , Hellenistes), have been attested since ancient times, it was J. G. Droysen in the mid-19th century, who in his classic work Geschichte des Hellenismus, i.e. History of Hellenism, coined the term Hellenistic to refer to and define the period when Greek culture spread in the non-Greek world after Alexander's conquest. Following Droysen, Hellenistic and related terms, e.g. Hellenism, have been widely used in various contexts; a notable such use is in Culture and Anarchy by Matthew Arnold, where Hellenism is used in contrast with Hebraism.

Now answer this question: What century did Hellenistic become a concept?

Output: 19th

Input: Article: In May 2013, Thein Sein became the first Myanmar president to visit the White House in 47 years; the last Burmese leader to visit the White House was Ne Win in September 1966. President Barack Obama praised the former general for political and economic reforms, and the cessation of tensions between Myanmar and the United States. Political activists objected to the visit due to concerns over human rights abuses in Myanmar but Obama assured Thein Sein that Myanmar will receive US support. The two leaders discussed to release more political prisoners, the institutionalisation of political reform and rule of law, and ending ethnic conflict in Myanmarthe two governments agreed to sign a bilateral trade and investment framework agreement on 21 May 2013.

Now answer this question: When was the most prior visit from a Burmese representative to the United States prior to 2010 ?

Output: the last Burmese leader to visit the White House was Ne Win in September 1966

Input: Article: In late 1954, Gen. J. Lawton Collins was made ambassador to "Free Vietnam" (the term South Vietnam came into use in 1955), effectively elevating the country to sovereign status. Collins' instructions were to support the leader Ngo Dinh Diem in subverting communism, by helping him to build an army and wage a military campaign. In February 1955, Eisenhower dispatched the first American soldiers to Vietnam as military advisors to Diem's army. After Diem announced the formation of the Republic of Vietnam (RVN, commonly known as South Vietnam) in October, Eisenhower immediately recognized the new state and offered military, economic, and technical assistance.

Now answer this question: Who was the leader of South Vietnam in 1954?

Output:
Ngo Dinh Diem