Question:
Stephen Arthur Stills (born January 3, 1945) is an American singer, songwriter, and multi-instrumentalist best known for his work with Buffalo Springfield and Crosby, Stills, Nash & Young. Beginning his professional career with Buffalo Springfield, he composed one of their few hits "For What It's Worth," which became one of the most recognizable songs of the 1960s. Other notable songs he contributed to the band were "Sit Down, I Think I Love You
Stills, Furay, and Young reunited in Los Angeles and formed the core of Buffalo Springfield. Legend has it that Stills and Furay recognized Young's converted hearse on the streets of LA and flagged him down, a meeting described in a recent solo track "Round the Bend." The band would release three albums: Buffalo Springfield, Buffalo Springfield Again, and Last Time Around, and enjoy only one hit single, the Stills-penned "For What It's Worth" before disbanding. A Stills song from their debut album, "Sit Down, I Think I Love You," was a minor hit for the Mojo Men in 1967. During the disintegration of Buffalo Springfield, Stills played on the Super Session album with Al Kooper and joined up with David Crosby, who had recently been ejected from the Byrds in the autumn of 1967. At a party in Laurel Canyon, Crosby was introduced to Graham Nash by a mutual friend, Cass Elliot (formerly of the Mamas and the Papas), and Nash found himself soon joining in singing with Crosby and Stills. Renditions of the latter's "You Don't Have to Cry," led to the formation of Crosby, Stills & Nash. Several of Stills's songs, including "Suite: Judy Blue Eyes" and "You Don't Have To Cry" on the debut album were inspired by his on-again-off-again relationship with singer Judy Collins. In a 1971 interview in Rolling Stone the interviewer noted, "so many of your songs seem to be about Judy Collins." Stills replied, "Well, there are three things men can do with women: love them, suffer for them, or turn them into literature. I've had my share of success and failure at all three." The cover photo pictured on the debut was taken on the back porch of a house in West Hollywood, which was torn down the next day. Wanting to be able to tour and needing additional musicians, the band invited Neil Young to join them for their subsequent tour and second album to make the group the quartet Crosby Stills Nash & Young. Having played at the Monterey Pop Festival with Buffalo Springfield, and both Woodstock and Altamont with CSNY, Stills performed at all three of the iconic U.S. rock festivals of the 1960s.
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Which tour was this?

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Question:
Marc Zakharovich Chagall ( sh@-GAHL; born Moishe Zakharovich Shagal; 6 July [O.S. 24 June] 1887 - 28 March 1985) was a Russian-French artist of Belarusian Jewish origin. An early modernist, he was associated with several major artistic styles and created works in virtually every artistic format, including painting, book illustrations, stained glass, stage sets, ceramic, tapestries and fine art prints. Art critic Robert Hughes referred to Chagall as "the quintessential Jewish artist of the twentieth century" (though Chagall saw his work as "not the dream of one people but of all humanity"). According to art historian Michael J. Lewis, Chagall was considered to be "the last survivor of the first generation of European modernists".
In Russia at that time, Jewish children were not allowed to attend regular Russian schools or universities. Their movement within the city was also restricted. Chagall therefore received his primary education at the local Jewish religious school, where he studied Hebrew and the Bible. At the age of 13, his mother tried to enroll him in a Russian high school, and he recalled, "But in that school, they don't take Jews. Without a moment's hesitation, my courageous mother walks up to a professor." She offered the headmaster 50 roubles to let him attend, which he accepted. A turning point of his artistic life came when he first noticed a fellow student drawing. Baal-Teshuva writes that for the young Chagall, watching someone draw "was like a vision, a revelation in black and white". Chagall would later say that there was no art of any kind in his family's home and the concept was totally alien to him. When Chagall asked the schoolmate how he learned to draw, his friend replied, "Go and find a book in the library, idiot, choose any picture you like, and just copy it". He soon began copying images from books and found the experience so rewarding he then decided he wanted to become an artist. He eventually confided to his mother, "I want to be a painter", although she could not yet understand his sudden interest in art or why he would choose a vocation that "seemed so impractical", writes Goodman. The young Chagall explained, "There's a place in town; if I'm admitted and if I complete the course, I'll come out a regular artist. I'd be so happy!" It was 1906, and he had noticed the studio of Yehuda (Yuri) Pen, a realist artist who also operated a small drawing school in Vitebsk, which included the future artists El Lissitzky and Ossip Zadkine. Due to Chagall's youth and lack of income, Pen offered to teach him free of charge. However, after a few months at the school, Chagall realized that academic portrait painting did not suit his desires.
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Where is the studio of Yehuda Pen located?

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Vitebsk,