Question: When did the most influential recording artist of all time drop out of college?

full_context: Document 1: Madonna (entertainer): Madonna's music has been the subject of much analysis and scrutiny. Robert M. Grant, author of Contemporary Strategy Analysis (2005), commented that what has brought Madonna success is "certainly not outstanding natural talent. As a vocalist, musician, dancer, songwriter, or actress, Madonna's talents seem modest." He asserts Madonna's success is in relying on the talents of others, and that her personal relationships have served as cornerstones to the numerous reinventions in the longevity of her career. Madonna's approach was far from the music industry wisdom of "Find a winning formula and stick to it." Her musical career has been a continuous experimentation with new musical ideas and new images and a constant quest for new heights of fame and acclaim. Grant concluded that "having established herself as the queen of popular music, Madonna did not stop there, but continued re-inventing." Musicologist Susan McClary wrote that "Madonna's art itself repeatedly deconstructs the traditional notion of the unified subject with finite ego boundaries. Her pieces explore various ways of constituting identities that refuse stability, that remain fluid, that resist definition."
Document 2: Madonna (entertainer): In The Madonna Companion biographers Allen Metz and Carol Benson noted that more than any other recent pop artist, Madonna had used MTV and music videos to establish her popularity and enhance her recorded work. According to them, many of her songs have the imagery of the music video in strong context, while referring to the music. Cultural critic Mark C. Taylor in his book Nots (1993) felt that the postmodern art form par excellence is video and the reigning "queen of video" is Madonna. He further asserted that "the most remarkable creation of MTV is Madonna. The responses to Madonna's excessively provocative videos have been predictably contradictory." The media and public reaction towards her most-discussed songs such as "Papa Don't Preach", "Like a Prayer", or "Justify My Love" had to do with the music videos created to promote the songs and their impact, rather than the songs themselves. Morton felt that "artistically, Madonna's songwriting is often overshadowed by her striking pop videos."
Document 3: Madonna (entertainer): Having sold more than 300 million records worldwide, Madonna is recognized as the best-selling female recording artist of all time by Guinness World Records. The Recording Industry Association of America (RIAA) listed her as the best-selling female rock artist of the 20th century and the second best-selling female artist in the United States, with 64.5 million certified albums. According to Billboard, Madonna is the highest-grossing solo touring artist of all time, earning US $1.31 billion from her concerts since 1990. She was ranked at number two, behind only The Beatles, on the Billboard Hot 100 All-Time Top Artists, making her the most successful solo artist in the history of American singles chart. Madonna became one of the five founding members of the UK Music Hall of Fame and was inducted into the Rock and Roll Hall of Fame in her first year of eligibility.
Document 4: Madonna (entertainer): Madonna Louise Ciccone (/tʃɪˈkoʊni/; Italian: [tʃikˈkoːne]; born August 16, 1958) is an American singer, songwriter, actress, and businesswoman. She achieved popularity by pushing the boundaries of lyrical content in mainstream popular music and imagery in her music videos, which became a fixture on MTV. Madonna is known for reinventing both her music and image, and for maintaining her autonomy within the recording industry. Music critics have acclaimed her musical productions, which have generated some controversy. Often referred to as the "Queen of Pop", she is often cited as an influence by other artists.
Document 5: Madonna (entertainer): Throughout her career Madonna has been involved in writing and producing most of her own music. Madonna's early songwriting skill was developed during her time with the Breakfast Club in 1979. According to author Carol Gnojewski, her first attempts at songwriting are perceived as an important self-revelation, as Madonna said: "I don't know where [the songs] came from. It was like magic. I'd write a song every day. I said 'Wow, I was meant to do this'." Mark Kamins, her first producer, believed that Madonna is "a much underrated musician and lyricist." Rolling Stone has named her "an exemplary songwriter with a gift for hooks and indelible lyrics." According to Freya Jarman-Ivens, Madonna's talent for developing "incredible" hooks for her songs allows the lyrics to capture the attention of the audience, even without the influence of the music. As an example, Jarman-Ivens cites the 1985 single "Into the Groove" and its line "Live out your fantasy here with me, just let the music set you free; Touch my body, and move in time, now I know you're mine." Madonna's songwriting are often autobiographical over the years, dealing with various themes from love and relationships to self-respect and female empowerment. Her songs also speak about taboo and unconventional issues of their period, such as sexuality and AIDS on Erotica (1992). Many of her lyrics contain innuendos and double entendre, which lead to multiple interpretations among music critics and scholars. Madonna has been nominated for being inducted into the Songwriters Hall of Fame twice, for 2014 and 2016 ceremony. Rolling Stone listed Madonna at number 56 on the "100 Greatest Songwriters of All Time".
Document 6: Madonna (entertainer): Before emerging as a pop star, Madonna has spent her early years in rock music alongside her bands, Breakfast Club and Emmy. While performing with Emmy, Madonna recorded about 12-14 songs which resemble the punk rock of that period. Her early rock roots also can be found on the demo album Pre-Madonna. Stephen Thomas Erlewine noted that with her self-titled debut album, Madonna began her career as a disco diva, in an era that did not have any such divas to speak of. In the beginning of the '80's, disco was an anathema to the mainstream pop, and according to Erlewine, Madonna had a huge role in popularizing dance music as mainstream music. The album's songs reveal several key trends that have continued to define her success, including a strong dance-based idiom, catchy hooks, highly polished arrangements and Madonna's own vocal style. Her second album, Like a Virgin (1984), foreshadowed several trends in her later works. It contained references to classical works (pizzicato synthesizer line that opens "Angel"); potential negative reaction from social groups ("Dress You Up" was blacklisted by the Parents Music Resource Center); and retro styles ("Shoo-Bee-Doo", Madonna's homage to Motown).
Document 7: Madonna (entertainer): According to Tony Sclafani from MSNBC, "It's worth noting that before Madonna, most music mega-stars were guy rockers; after her, almost all would be female singers ... When The Beatles hit America, they changed the paradigm of performer from solo act to band. Madonna changed it back—with an emphasis on the female." Howard Kramer, curatorial director of the Rock and Roll Hall of Fame and Museum, asserted that "Madonna and the career she carved out for herself made possible virtually every other female pop singer to follow ... She certainly raised the standards of all of them ... She redefined what the parameters were for female performers." According to Fouz-Hernández, subsequent female singers such as Britney Spears, Christina Aguilera, Kylie Minogue, the Spice Girls, Destiny's Child, Jennifer Lopez, and Pink were like her "daughters in the very direct sense that they grew up listening to and admiring Madonna, and decided they wanted to be like her." Time magazine included her in the list of the "25 Most Powerful Women of the Past Century", where she became one of only two singers to be included, alongside Aretha Franklin. She also topped VH1's lists of "100 Greatest Women in Music" and "50 Greatest Women of the Video Era".
Document 8: Madonna (entertainer): In 1978, she dropped out of college and relocated to New York City. She had little money and worked as a waitress at Dunkin' Donuts and with modern dance troupes, taking classes at the Alvin Ailey American Dance Theater and eventually performing with Pear Lang Dance Theater. Madonna said of her move to New York, "It was the first time I'd ever taken a plane, the first time I'd ever gotten a taxi cab. I came here with $35 in my pocket. It was the bravest thing I'd ever done." She started to work as a backup dancer for other established artists. Madonna claimed that during a late night she was returning from a rehearsal, when a pair of men held her at knifepoint and forced her to perform fellatio. Madonna later commented that "the episode was a taste of my weakness, it showed me that I still could not save myself in spite of all the strong-girl show. I could never forget it."
Document 9: Madonna (entertainer): Various music journalists, critical theorists, and authors have deemed Madonna the most influential female recording artist of all time. Author Carol Clerk wrote that "during her career, Madonna has transcended the term 'pop star' to become a global cultural icon." Rolling Stone of Spain wrote that "She became the first viral Master of Pop in history, years before the Internet was massively used. Madonna was everywhere; in the almighty music television channels, 'radio formulas', magazine covers and even in bookshops. A pop dialectic, never seen since The Beatles's reign, which allowed her to keep on the edge of tendency and commerciality." Laura Barcella in her book Madonna and Me: Women Writers on the Queen of Pop (2012) wrote that "really, Madonna changed everything the musical landscape, the '80s look du jour, and most significantly, what a mainstream female pop star could (and couldn't) say, do, or accomplish in the public eye." William Langley from The Daily Telegraph felt that "Madonna has changed the world's social history, has done more things as more different people than anyone else is ever likely to." Alan McGee from The Guardian felt that Madonna is a post-modern art, the likes of which we will never see again. He further asserted that Madonna and Michael Jackson invented the terms Queen and King of Pop.
Document 10: Madonna (entertainer): Born in Bay City, Michigan, Madonna moved to New York City in 1977 to pursue a career in modern dance. After performing in the music groups Breakfast Club and Emmy, she signed with Sire Records (an auxiliary label of Warner Bros. Records) in 1982 and released her self-titled debut album the following year. She followed it with a series of commercially and critcally successful albums, including the Grammy Award winners Ray of Light (1998) and Confessions on a Dance Floor (2005). Throughout her career, Madonna has written and produced most of her songs, with many of them reaching number one on the record charts, including "Like a Virgin", "Into the Groove", "Papa Don't Preach", "Like a Prayer", "Vogue", "Frozen", "Music", "Hung Up", and "4 Minutes".
Document 11: Madonna (entertainer): Madonna turned to her paternal grandmother for solace. The Ciccone siblings resented housekeepers and invariably rebelled against anyone brought into their home ostensibly to take the place of their beloved mother. Madonna later told Vanity Fair that she saw herself in her youth as a "lonely girl who was searching for something. I wasn't rebellious in a certain way. I cared about being good at something. I didn't shave my underarms and I didn't wear make-up like normal girls do. But I studied and I got good grades.... I wanted to be somebody." Terrified that her father Tony could be taken from her as well, Madonna was often unable to sleep unless she was near him.
Document 12: Madonna (entertainer): Madonna has received acclaim as a role model for businesswomen in her industry, "achieving the kind of financial control that women had long fought for within the industry", and generating over $1.2 billion in sales within the first decade of her career. Professor Colin Barrow from Cranfield School of Management described Madonna as "America's smartest businesswoman ... who has moved to the top of her industry and stayed there by constantly reinventing herself." London Business School academics called her a "dynamic entrepreneur" worth copying; they identified her vision of success, her understanding of the music industry, her ability to recognize her own performance limits (and thus bring in help), her willingness to work hard and her ability to adapt as the keys to her commercial success. Morton wrote that "Madonna is opportunistic, manipulative, and ruthless—somebody who won't stop until she gets what she wants—and that's something you can get at the expense of maybe losing your close ones. But that hardly mattered to her." Hazel Blackmore and Rafael Fernández de Castro in the book ¿Qué es Estados Unidos? from the Fondo de Cultura Económica, noted: "Madonna has been undoubtedly the most important woman in the history of popular music and a great businesswoman in herself; creating fashion, breaking taboos and provoking controversies."
Document 13: Madonna (entertainer): Madonna's use of sexual imagery has benefited her career and catalyzed public discourse on sexuality and feminism. As Roger Chapman documents in Culture Wars: An Encyclopedia of Issues, Viewpoints, and Voices, Volume 1 (2010), she has drawn frequent condemnation from religious organizations, social conservatives and parental watchdog groups for her use of explicit, sexual imagery and lyrics, religious symbolism, and otherwise "irreverent" behavior in her live performances. The Times wrote that she had "started a revolution amongst women in music ... Her attitudes and opinions on sex, nudity, style and sexuality forced the public to sit up and take notice." Professor John Fiske noted that the sense of empowerment that Madonna offers is inextricably connected with the pleasure of exerting some control over the meanings of self, of sexuality, and of one's social relations. In Doing Gender in Media, Art and Culture (2009), the authors noted that Madonna, as a female celebrity, performer, and pop icon, is able to unsettle standing feminist reflections and debates. According to lesbian feminist Sheila Jeffreys, Madonna represents woman's occupancy of what Monique Wittig calls the category of sex, as powerful, and appears to gleefully embrace the performance of the sexual corvée allotted to women. Professor Sut Jhally has referred to Madonna as "an almost sacred feminist icon."
Document 14: Madonna (entertainer): Besides singing Madonna has the ability to play several musical instruments. She learned to play drum and guitar from her then-boyfriend Dan Gilroy in the late 1970s before joining the Breakfast Club line-up as the drummer. This helped her to form the band Emmy, where she performed as the guitarist and lead vocalist. Madonna later played guitar on her demo recordings. On the liner notes of Pre-Madonna, Stephen Bray wrote: "I've always thought she passed up a brilliant career as a rhythm guitarist." After her career breakthrough, Madonna focused mainly in singing but was also credited for playing cowbell on Madonna (1983) and synthesizer on Like a Prayer (1989). In 1999, Madonna had studied for three months to play the violin for the role as a violin teacher in the film Music of the Heart, before eventually leaving the project. After two decades, Madonna decided to perform with guitar again during the promotion of Music (2000). She took further lessons from guitarist Monte Pittman to improve her guitar skill. Since then Madonna has played guitar on every tour, as well as her studio albums. At the 2002 Orville H. Gibson Guitar Awards, she received nomination for Les Paul Horizon Award, which honors the most promising up-and-coming guitarist.
Document 15: Madonna (entertainer): Madonna entered mainstream films in February 1985, beginning with a brief appearance as a club singer in Vision Quest, a romantic drama film. Its soundtrack contained two new singles, her U.S. number-one single, "Crazy for You", and another track "Gambler". She also played the title role in the 1985 comedy Desperately Seeking Susan, a film which introduced the song "Into the Groove", her first number-one single in the UK. Her popularity relegated the film as a Madonna vehicle, despite not having lead actress billing. The New York Times film critic Vincent Canby named it one of the ten best films of 1985.Beginning in April 1985, Madonna embarked on her first concert tour in North America, The Virgin Tour, with the Beastie Boys as her opening act. She progressed from playing CBGB and the Mudd Club to playing large sporting arenas. The tour saw the peak of Madonna wannabe phenomenon, with lots of female attendees dressing like her. At that time, she released two more hits, "Angel" and "Dress You Up", making all four singles from the album peak inside the top five on the Hot 100 chart. In July, Penthouse and Playboy magazines published a number of nude photos of Madonna, taken in New York in 1978. She had posed for the photographs as she needed money at the time, and was paid as little as $25 a session. The publication of the photos caused a media uproar, but Madonna remained "unapologetic and defiant". The photographs were ultimately sold for up to $100,000. She referred to these events at the 1985 outdoor Live Aid charity concert, saying that she would not take her jacket off because "[the media] might hold it against me ten years from now."
ground_truth: 1978
sub_queries: Who is the most influential recording artist of all time? Answer: Madonna
When did Madonna drop out of college? Answer: 1978