IN: 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.

From the 5th to the mid-9th centuries, the art of the Picts is primarily known through stone sculpture, and a smaller number of pieces of metalwork, often of very high quality; there are no known illuminated manuscripts. The Picts shared modern Scotland with a zone of Irish cultural influence on the west coast, including Iona, and the Anglo-Saxon kingdom of Northumbria to the south. After Christianization, Insular styles heavily influenced Pictish art, with interlace prominent in both metalwork and stones.  Pictish stones are assigned by scholars to 3 classes. Class I Pictish stones are unshaped standing stones incised with a series of about 35 symbols which include abstract designs (given descriptive names such as crescent and V-rod, double disc and Z-rod, 'flower' and so on by researchers); carvings of recognisable animals (bull, eagle, salmon, adder and others), as well as the Pictish Beast, and objects from daily life (a comb, a mirror). The symbols almost always occur in pairs, with in about one-third of cases the addition of the mirror, or mirror and comb, symbol, below the others. This is often taken to symbolise a woman. Apart from one or two outliers, these stones are found exclusively in north-east Scotland from the Firth of Forth to Shetland. Good examples include the Dunnichen and Aberlemno stones (Angus), and the Brandsbutt and Tillytarmont stones (Aberdeenshire).  Class II stones are shaped cross-slabs carved in relief, or in a combination of incision and relief, with a prominent cross on one, or in rare cases two, faces. The crosses are elaborately decorated with interlace, key-pattern or scrollwork, in the Insular style. On the secondary face of the stone, Pictish symbols appear, often themselves elaborately decorated, accompanied by figures of people (notably horsemen), animals both realistic and fantastic, and other scenes. Hunting scenes are common, Biblical motifs less so. The symbols often appear to 'label' one of the human figures. Scenes of battle or combat between men and fantastic beasts may be scenes from Pictish mythology. Good examples include slabs from Dunfallandy and Meigle (Perthshire), Aberlemno (Angus), Nigg, Shandwick and Hilton of Cadboll (Easter Ross).  Class III stones are in the Pictish style, but lack the characteristic symbols. Most are cross-slabs, though there are also recumbent stones with sockets for an inserted cross or small cross-slab (e.g. at Meigle, Perthshire). These stones may date largely to after the Scottish takeover of the Pictish kingdom in the mid 9th century. Examples include the sarcophagus and the large collection of cross-slabs at St Andrews (Fife).  The following museums have important collections of Pictish stones: Meigle (Perthshire), St Vigeans (Angus) and St Andrew's Cathedral (Fife) (all Historic Scotland), the Museum of Scotland, Edinburgh (which also exhibits almost all the major pieces of surviving Pictish metalwork), the Meffan Institute, Forfar (Angus), Inverness Museum, Groam House Museum, Rosemarkie and Tarbat Discovery Centre, Portmahomack (both Easter Ross) and Tankerness House Museum, Kirkwall, Orkney.

Are these in Scotland?

OUT: the Museum of Scotland, Edinburgh (which also exhibits almost all the major pieces of surviving Pictish metalwork),

input: In November 1966, during a return flight to London from Kenya, where he had been on holiday with Beatles tour manager Mal Evans, McCartney had an idea for a song that eventually formed the impetus of the Sgt. Pepper concept. His idea involved an Edwardian-era military band, for which Evans invented a name in the style of contemporary San Francisco-based groups such as Big Brother and the Holding Company and Quicksilver Messenger Service. In February 1967, McCartney suggested that the Beatles should record an entire album that would represent a performance by the fictional band. This alter ego group would give them the freedom to experiment musically. He explained: "I thought, let's not be ourselves. Let's develop alter egos." Martin remembered:  "Sergeant Pepper" itself didn't appear until halfway through making the album. It was Paul's song, just an ordinary rock number ... but when we had finished it, Paul said, "Why don't we make the album as though the Pepper band really existed, as though Sergeant Pepper was making the record? We'll dub in effects and things." I loved the idea, and from that moment on it was as though Pepper had a life of its own.  In 1966, the American musician and bandleader Brian Wilson's growing interest in the aesthetics of recording and his admiration for both record producer Phil Spector's Wall of Sound and the Beatles' album Rubber Soul resulted in the Beach Boys' Pet Sounds LP, which demonstrated his production expertise and his mastery of composition and arrangement. The author Thomas MacFarlane credits the release with influencing many musicians of the time, with McCartney in particular singing its praises and drawing inspiration to "expand the focus of the Beatles' work with sounds and textures not usually associated with popular music". McCartney thought that his constant playing of the album made it difficult for Lennon to "escape the influence", adding: "It's very cleverly done ... so we were inspired by it and nicked a few ideas." Martin stated: "Without Pet Sounds, Sgt. Pepper never would have happened ... Pepper was an attempt to equal Pet Sounds."  Freak Out! by the Mothers of Invention has also been cited as having influenced Sgt. Pepper. According to the author Philip Norman, during the Sgt. Pepper recording sessions McCartney repeatedly stated: "This is our Freak Out!" The music journalist Chet Flippo states that McCartney was inspired to record a concept album after hearing Freak Out!, considered the first rock concept album.

Answer this question "What inspired the album Sgt. Pepper's Lonely Hearts Club Band?"
output:
during a return flight to London from Kenya, where he had been on holiday with Beatles tour manager Mal Evans,