input: In Icons of Rock: An Encyclopedia of the Legends Who Changed Music Forever, Scott Schinder and Andy Schwartz describe the Beatles' musical evolution:  In their initial incarnation as cheerful, wisecracking moptops, the Fab Four revolutionised the sound, style, and attitude of popular music and opened rock and roll's doors to a tidal wave of British rock acts. Their initial impact would have been enough to establish the Beatles as one of their era's most influential cultural forces, but they didn't stop there. Although their initial style was a highly original, irresistibly catchy synthesis of early American rock and roll and R&B, the Beatles spent the rest of the 1960s expanding rock's stylistic frontiers, consistently staking out new musical territory on each release. The band's increasingly sophisticated experimentation encompassed a variety of genres, including folk-rock, country, psychedelia, and baroque pop, without sacrificing the effortless mass appeal of their early work.  In The Beatles as Musicians, Walter Everett describes Lennon and McCartney's contrasting motivations and approaches to composition: "McCartney may be said to have constantly developed - as a means to entertain - a focused musical talent with an ear for counterpoint and other aspects of craft in the demonstration of a universally agreed-upon common language that he did much to enrich. Conversely, Lennon's mature music is best appreciated as the daring product of a largely unconscious, searching but undisciplined artistic sensibility."  Ian MacDonald describes McCartney as "a natural melodist - a creator of tunes capable of existing apart from their harmony". His melody lines are characterised as primarily "vertical", employing wide, consonant intervals which express his "extrovert energy and optimism". Conversely, Lennon's "sedentary, ironic personality" is reflected in a "horizontal" approach featuring minimal, dissonant intervals and repetitive melodies which rely on their harmonic accompaniment for interest: "Basically a realist, he instinctively kept his melodies close to the rhythms and cadences of speech, colouring his lyrics with bluesy tone and harmony rather than creating tunes that made striking shapes of their own." MacDonald praises Harrison's lead guitar work for the role his "characterful lines and textural colourings" play in supporting Lennon and McCartney's parts, and describes Starr as "the father of modern pop/rock drumming".

Answer this question "What is the most unique fact in the article?"
output: their initial incarnation as cheerful, wisecracking moptops, the Fab Four revolutionised the sound, style, and attitude of popular music and opened rock and roll's doors

input: In 1634, the Menominee and Ho-Chunk people (along with a band of Potawatomi who had recently moved into Wisconsin) witnessed the French explorer Jean Nicolet's approach and landing. Red Banks, near the present-day city of Green Bay, Wisconsin, later developed in this area. Nicolet, looking for a Northwest Passage to China, hoped to find and impress the Chinese. As the canoe approached the shore, Nicolet put on a silk Chinese ceremonial robe, stood up in the middle of the canoe and shot off two pistols.  For at least forty years in the 20th century, this event was presented in a biased fashion to elementary school students studying Wisconsin history. The Native people were said to fear "the light-skinned man who could make thunder." John Boatman has said it was more likely the native people feared for the light-skinned man, as he had demonstrated questionable mental faculties. Anyone with local knowledge would know better than to stand up in a canoe on the choppy waters of Green Bay.  Pierre Francois Xavier de Charlevoix (1682-1761), a French Catholic clergyman, professor, historian, author and explorer, kept a detailed journal of his travels through Wisconsin and Louisiana. In 1721 he came upon the Menominee, whom he referred to as Malhomines ("peuples d'avoines" or (Wild Oat Indians), which the French had adapted from an Ojibwe term:  After we had advanced five or six leagues, we found ourselves abreast of a little island, which lies near the western side of the bay, and which concealed from our view, the mouth of a river, on which stands the village of the Malhomines Indians, called by our French "peuples d'avoines" or Wild Oat Indians, probably from their living chiefly on this sort of grain. The whole nation consists only of this village, and that too not very numerous. 'Tis really great pity, they being the finest and handsomest men in all Canada. They are even of a larger stature than the Potawatomi. I have been assured that they had the same original and nearly the same languages with the Noquets, and the Indians at the Falls.

Answer this question "did they engage in trading?"
output: 

input: After the decline of their success after "Mama Lover", the group started to record songs for their third studio album. In January 2013, the group announced that they would release their further material in Japan after signing with EMI Music. They also announced that they plan to release a compilation entitled Serebration that includes songs from their first and second studio albums. The group traveled to Japan to promote the compilation album and to do a live concert tour.  In March 2013, the group released their promotional single "Sexy Ass", but it failed to chart in Russia. In June 2013, the group released their single "Mi Mi Mi" which charted in Italy, peaking at 5 on the Italian iTunes chart. In July 2013, the group released the song "Malo Tebya". The song was released on Russian radio airplay on 10 July and marked a welcome return to the top ten in Russia for the band, ultimately peaking at number five. A new collaboration with DJ M.E.G., entitled "Ugar" (Ugar), has premiered on the band's Facebook page and the Promo DJ website on 18 September. The group announced that they signed a deal with Republic Records and Universal Music Group and discussed plans to re-release their single "Mi Mi Mi" as their first international single.  On 28 September, member Anastasia Karpova confirmed her planned departure from the group. Karpova had told Fadeev months prior that she intended to leave the group. She noted that the decision was mutual with other members of the band and that her primary motivation was to pursue a solo career. A new member, named Dasha Shashina, was announced on 3 October 2013. Shashina had re-recorded Anastasia's recordings in the group's songs "Malo Tebya" and "Ugar", which is expected to release a video with Shashina featuring in it.  Temnikova left the group in May 2014, ahead of her planned December exit, after having become pregnant. Karpova temporarily returned until newest member Polina Favorskaya was introduced on June 5, 2014.  Serebro's 3rd studio album '925' was supposed to be released on iTunes Russia on 15 October 2015 but due to their studio harddrive being stolen, the album release had to be cancelled.

Answer this question "Were there any other albums or songs"
output:
A new collaboration with DJ M.E.G., entitled "Ugar" (Ugar), has premiered on the band's Facebook page and the Promo DJ website on 18 September.