Problem: Question: "what is been discussed?" Context: "Both private individuals and large production companies have used YouTube to grow audiences. Independent content creators have built grassroots followings numbering in the thousands at very little cost or effort, while mass retail and radio promotion proved problematic. Concurrently, old media celebrities moved into the website at the invitation of a YouTube management that witnessed early content creators accruing substantial followings, and perceived audience sizes potentially larger than that attainable by television. While YouTube's revenue-sharing "Partner Program" made it possible to earn a substantial living as a video producerits top five hundred partners each earning more than $100,000 annually and its ten highest-earning channels grossing from $2.5 million to $12 millionin 2012 CMU business editor characterized YouTube as "a free-to-use... promotional platform for the music labels". In 2013 Forbes' Katheryn Thayer asserted that digital-era artists' work must not only be of high quality, but must elicit reactions on the YouTube platform and social media. In 2013, videos of the 2.5% of artists categorized as "mega", "mainstream" and "mid-sized" received 90.3% of the relevant views on YouTube and Vevo. By early 2013 Billboard had announced that it was factoring YouTube streaming data into calculation of the Billboard Hot 100 and related genre charts." Answer:

A: YouTube

Problem: Question: "Who was better Daughtry or Hicks" Context: "Despite being eliminated earlier in the season, Chris Daughtry (as lead of the band Daughtry) became the most successful recording artist from this season. Other contestants, such as Hicks, McPhee, Bucky Covington, Mandisa, Kellie Pickler, and Elliott Yamin have had varying levels of success." Answer:

A: Daughtry

Problem: Question: "Who took charge of the landscape?" Context: "With the defeat of the Confederacy in 1865, the Reconstruction Era began. The United States abolished slavery without compensation to slaveholders or reparations to freedmen. A Republican Party coalition of black freedmen, northern carpetbaggers and local scalawags controlled state government for three years. The white conservative Democrats regained control of the state legislature in 1870, in part by Ku Klux Klan violence and terrorism at the polls, to suppress black voting. Republicans were elected to the governorship until 1876, when the Red Shirts, a paramilitary organization that arose in 1874 and was allied with the Democratic Party, helped suppress black voting. More than 150 black Americans were murdered in electoral violence in 1876." Answer:

A: Ku Klux Klan

Problem: Question: "What is the discipline for which Euclid is known?" Context: "The Hellenistic period covers the period of ancient Greek (Hellenic) history and Mediterranean history between the death of Alexander the Great in 323 BC and the emergence of the Roman Empire as signified by the Battle of Actium in 31 BC and the subsequent conquest of Ptolemaic Egypt the following year. At this time, Greek cultural influence and power was at its peak in Europe, Africa and Asia, experiencing prosperity and progress in the arts, exploration, literature, theatre, architecture, music, mathematics, philosophy, and science. For example, competitive public games took place, ideas in biology, and popular entertainment in theaters. It is often considered a period of transition, sometimes even of decadence or degeneration, compared to the enlightenment of the Greek Classical era. The Hellenistic period saw the rise of New Comedy, Alexandrian poetry, the Septuagint and the philosophies of Stoicism and Epicureanism. Greek Science was advanced by the works of the mathematician Euclid and the polymath Archimedes. The religious sphere expanded to include new gods such as the Greco-Egyptian Serapis, eastern deities such as Attis and Cybele and the Greek adoption of Buddhism." Answer:

A:
mathematician