Problem: Background: Pieter Cornelis "Piet" Mondriaan, after 1906 Mondrian (; Dutch: ['pit 'mondrija:n], later ['mondrijan]; 7 March 1872 - 1 February 1944), was a Dutch painter and theoretician who is regarded as one of the greatest artists of the 20th century. He is known for being one of the pioneers of 20th century abstract art, as he changed his artistic direction from figurative painting to an increasingly abstract style, until he reached a point where his artistic vocabulary was reduced to simple geometric elements. Mondrian's art was highly utopian and was concerned with a search for universal values and aesthetics. He proclaimed in 1914: Art is higher than reality and has no direct relation to reality.
Context: When the 47-year-old Piet Mondrian left the Netherlands for unfettered Paris for the second and last time in 1919, he set about at once to make his studio a nurturing environment for paintings he had in mind that would increasingly express the principles of neoplasticism about which he had been writing for two years. To hide the studio's structural flaws quickly and inexpensively, he tacked up large rectangular placards, each in a single color or neutral hue. Smaller colored paper squares and rectangles, composed together, accented the walls. Then came an intense period of painting. Again he addressed the walls, repositioning the colored cutouts, adding to their number, altering the dynamics of color and space, producing new tensions and equilibrium. Before long, he had established a creative schedule in which a period of painting took turns with a period of experimentally regrouping the smaller papers on the walls, a process that directly fed the next period of painting. It was a pattern he followed for the rest of his life, through wartime moves from Paris to London's Hampstead in 1938 and 1940, across the Atlantic to Manhattan.  At the age of 71 in the fall of 1943, Mondrian moved into his second and final Manhattan studio at 15 East 59th Street, and set about to recreate the environment he had learned over the years was most congenial to his modest way of life and most stimulating to his art. He painted the high walls the same off-white he used on his easel and on the seats, tables and storage cases he designed and fashioned meticulously from discarded orange and apple-crates. He glossed the top of a white metal stool in the same brilliant primary red he applied to the cardboard sheath he made for the radio-phonograph that spilled forth his beloved jazz from well-traveled records. Visitors to this last studio seldom saw more than one or two new canvases, but found, often to their astonishment, that eight large compositions of colored bits of paper he had tacked and re-tacked to the walls in ever-changing relationships constituted together an environment that, paradoxically and simultaneously, was both kinetic and serene, stimulating and restful. It was the best space, Mondrian said, that he had inhabited. He was there for only a few months, as he died in February 1944.  After his death, Mondrian's friend and sponsor in Manhattan, artist Harry Holtzman, and another painter friend, Fritz Glarner, carefully documented the studio on film and in still photographs before opening it to the public for a six-week exhibition. Before dismantling the studio, Holtzman (who was also Mondrian's heir) traced the wall compositions precisely, prepared exact portable facsimiles of the space each had occupied, and affixed to each the original surviving cut-out components. These portable Mondrian compositions have become known as "The Wall Works". Since Mondrian's death, they have been exhibited twice at Manhattan's Museum of Modern Art (1983 and 1995-96), once in SoHo at the Carpenter + Hochman Gallery (1984), once each at the Galerie Tokoro in Tokyo, Japan (1993), the XXII Biennial of Sao Paulo (1994), the University of Michigan (1995), and - the first time shown in Europe - at the Akademie der Kunste (Academy of The Arts), in Berlin (22 February - 22 April 2007).
Question: What were some other exhibits that features his works?
Answer: Since Mondrian's death, they have been exhibited twice at Manhattan's Museum of Modern Art (1983 and 1995-96),

Problem: Background: Joseph Guilherme Raposo, OIH (February 8, 1937 - February 5, 1989) was a Portuguese-American composer, songwriter, pianist, television writer and lyricist, best known for his work on the children's television series Sesame Street, for which he wrote the theme song, as well as classic songs such as "Bein' Green" and "C Is For Cookie". He also wrote music for television shows such as The Electric Company, Shining Time Station and the sitcoms Three's Company and The Ropers, including their theme songs. In addition to these works, Raposo also composed extensively for the DePatie-Freleng Enterprises such as Halloween Is Grinch Night, Pontoffel Pock, Where Are You? and The Grinch Grinches the Cat in the Hat.
Context: In 1971, Children's Television Workshop created the show The Electric Company, meant to help teach reading to children who had outgrown Sesame Street. Raposo served as the musical director of the show for its first three seasons, and contributed songs throughout the show's run, until 1977.  Raposo performed joke characters for film segments on The Electric Company similar in style to what he had done on Sesame Street. One segment showed him attempting to get dressed in jacket and necktie against a white wall under the word "dressing", until the prefix "un-" appears and attaches itself to the prior word, forcing him to engage in a mock striptease which ends with him modestly hopping off-screen and tossing the remainder of his clothing into an empty chair left on-screen. In a variation of this film, he is shown packing a suitcase when the "un-" prefix returns and pesters him using the behavior of a meddling fly until, exasperated, Raposo strikes the word with a hammer, knocking it unconscious into the suitcase, which he then triumphantly slams shut with a smirk.  Raposo enjoyed doing animation voicework. Other forays of his into the craft included both the tenor singing role of "master pickler" Gil Gickler in DePatie-Freleng's Dr. Seuss cartoon program Pontoffel Pock, Where Are You? and Gickler's spoken dialogue. Raposo also performed at least three other character voices in the cartoon, including a Groogen musician whose "flugel bugle" is destroyed by Pontoffel in an attack flyover, as the ancient Senior Fairy above McGillicuddy who oversees the fairy squadron's worldwide search for the missing Pock and his piano, and as an angry Groogen dairywoman spilt milk upon by a too-close fly-by of Pontoffel's.  The HBO animated adaptation of Madeline, for which Raposo composed the music and songs (with writer/lyricist Judy Rothman), aired four months after Raposo's death; the cartoon The Smoggies, for which Raposo wrote the theme song, premiered in Canada.
Question: How many years did he write songs?
Answer:
1977.