Background: Journey is an American rock band that formed in San Francisco in 1973, composed of former members of Santana and Frumious Bandersnatch. The band has gone through several phases; its strongest commercial success occurred between 1978 and 1987. During that period, the band released a series of hit songs, including "Don't Stop Believin'" (1981), which in 2009 became the top-selling track in iTunes history among songs not released in the 21st century. Its parent studio album, Escape, the band's eighth and most successful, reached No. 1 on the Billboard 200 and yielded another of their most popular singles, "Open Arms".
Context: With Cain on board, the band began writing material that would eventually lead up to Journey's biggest studio album, "Escape". Recording sessions began in April 1981, and lasted until the middle of June. Escape was released on July 31, 1981, and immediately the album became a mainstream success. The album, which has thus far sold nine times platinum, went to number one on the album charts later that year, and included three top-ten hits: "Who's Cryin' Now", "Don't Stop Believin'" and "Open Arms". The last is Journey's highest-charting single to date, staying at No. 2 for six consecutive weeks and ranking at No.34 on Billboard's 1982 year-end Hot 100. MTV videotaped one of their two sold-out shows in Houston on November 6, 1981, in front of over 20,000 fans. Capitalizing on their success, the band recorded radio commercials for Budweiser and sold rights to their likenesses and music for use in two video games: the Journey arcade game by Bally/Midway and Journey Escape by Data Age for the Atari 2600. This success was met with criticism. The 1983 Rolling Stone Record Guide gave each of the band's albums only one star, with Dave Marsh writing that "Journey was a dead end for San Francisco area rock." Marsh later would anoint Escape as one of the worst number-one albums of all time. Journey's next album, Frontiers (1983), continued their commercial success, reaching No. 2 on the album charts, selling nearly six million copies. The album generated four Top 40 hits, "Separate Ways (Worlds Apart)", which reached No. 8, "Faithfully", which reached No. 12, "Send Her My Love" and "After the Fall", both of which reached No. 23. By this time, Journey had become one of the top touring and recording bands in the world. During the subsequent stadium tour, the band contracted with NFL Films to record a video documentary of their life on the road, Frontiers and Beyond. Scenes from the documentary were shot at JFK Stadium in Philadelphia, Pennsylvania with more than 80,000 fans in attendance.
Question: How many albums did they sell?
Answer: The album, which has thus far sold nine times platinum, went to number one on the album charts later that year,

Problem: Background: Celtic art is associated with the peoples known as Celts; those who spoke the Celtic languages in Europe from pre-history through to the modern period, as well as the art of ancient peoples whose language is uncertain, but have cultural and stylistic similarities with speakers of Celtic languages. Celtic art is a difficult term to define, covering a huge expanse of time, geography and cultures. A case has been made for artistic continuity in Europe from the Bronze Age, and indeed the preceding Neolithic age; however archaeologists generally use "Celtic" to refer to the culture of the European Iron Age from around 1000 BC onwards, until the conquest by the Roman Empire of most of the territory concerned, and art historians typically begin to talk about "Celtic art" only from the La Tene period (broadly 5th to 1st centuries BC) onwards. Early Celtic art is another term used for this period, stretching in Britain to about 150 AD.
Context: The ancient peoples now called "Celts" spoke a group of languages that had a common origin in the Indo-European language known as Common Celtic or Proto-Celtic. This shared linguistic origin was once widely accepted by scholars to indicate peoples with a common genetic origin in southwest Europe, who had spread their culture by emigration and invasion. Archaeologists identified various cultural traits of these peoples, including styles of art, and traced the culture to the earlier Hallstatt culture and La Tene culture. More recent genetic studies have indicated that various Celtic groups do not all have shared ancestry, and have suggested a diffusion and spread of the culture without necessarily involving significant movement of peoples. The extent to which "Celtic" language, culture and genetics coincided and interacted during prehistoric periods remains very uncertain and controversial. Celtic art is associated with the peoples known as Celts; those who spoke the Celtic languages in Europe from pre-history through to the modern period, as well as the art of ancient peoples whose language is uncertain, but have cultural and stylistic similarities with speakers of Celtic languages. The term "Celt" was used in classical times as a synonym for the Gauls (Keltoi, Celtae). Its English form is modern, attested from 1607. In the late 17th century the work of scholars such as Edward Lhuyd brought academic attention to the historic links between Gaulish and the Brythonic--and Goidelic--speaking peoples, from which point the term was applied not just to continental Celts but those in Britain and Ireland. Then in the 18th century the interest in "primitivism", which led to the idea of the "noble savage", brought a wave of enthusiasm for all things Celtic and Druidic. The "Irish revival" came after the Catholic Emancipation Act of 1829 as a conscious attempt to demonstrate an Irish national identity, and with its counterpart in other countries subsequently became the "Celtic Revival".
Question: Where does Celtic art come from?
Answer:
Celtic art is associated with the peoples known as Celts;