Problem: Background: Kevin Jeffrey Clash (born September 17, 1960) is an American puppeteer, director and producer whose characters include Elmo, Clifford, Benny Rabbit, and Hoots the Owl. Clash developed an interest in puppetry at an early age and began performing for local TV children's shows in his hometown of Baltimore, Maryland, as a teenager. In the early 1980s, he began working in Captain Kangaroo and began performing in Sesame Street in 1984. He was the fifth puppeteer to perform Elmo, the character he became the most famous for and became an executive producer and director for the show.
Context: Kevin Clash was born in Baltimore, Maryland, on September 17, 1960, the third of four children born to George Clash, a flash welder and handyman, and Gladys Clash, who ran a small daycare center in their two-bedroom, one-bath home in the Turner Station of Dundalk, Maryland. Clash developed an interest in puppetry at an early age, inspired by children's shows like Kukla, Fran and Ollie and Sesame Street. He made his first puppet, a version of Mickey Mouse, at the age of 10. When he was twelve, he created a monkey puppet out of the lining of his father's coat. His first performances were for his mother's daycare children. By the time he was a teenager, he had built almost 90 puppets, which he based upon commercials, popular music, and his friends. While still in high school, Clash performed at venues throughout Baltimore, including schools, churches, fundraisers, and community events. While appearing at a neighborhood festival, Clash was discovered by Baltimore television personality Stu Kerr, who became Clash's first mentor and hired him to perform in the children's show Caboose at Channel 2. Clash also built puppets for the Romper Room franchise. When he was 17, he contacted and met puppeteer Kermit Love, who became Clash's mentor, after seeing Love featured in an episode of the documentary Call It Macaroni. In 1979, on Love's recommendation, Clash appeared as Cookie Monster in the Sesame Street float during the Macy's Thanksgiving Day Parade, and met Jim Henson, who later became his boss, mentor, and good friend. When he was nineteen, Clash became a puppeteer for Captain Kangaroo, initially as a guest performer, in which he also made occasional on-camera appearances. The producers of Captain Kangaroo used some of Clash's puppet creations for the show. In 1984, Clash had to turn down Henson's offer to work on his film The Dark Crystal because he was working on two TV shows at the same time, Captain Kangaroo and Love's syndicated program The Great Space Coaster, in which he was producer for the first time.
Question: How long was he there?
Answer: When he was 17, he contacted and met puppeteer Kermit Love, who became Clash's mentor,

Problem: Background: Ellington was born on April 29, 1899, to James Edward Ellington and Daisy (Kennedy) Ellington in Washington, D.C. Both his parents were pianists. Daisy primarily played parlor songs and James preferred operatic arias.
Context: From 1936, Ellington began to make recordings with smaller groups (sextets, octets, and nonets) drawn from his then-15-man orchestra and he composed pieces intended to feature a specific instrumentalist, as with "Jeep's Blues" for Johnny Hodges, "Yearning for Love" for Lawrence Brown, "Trumpet in Spades" for Rex Stewart, "Echoes of Harlem" for Cootie Williams and "Clarinet Lament" for Barney Bigard. In 1937, Ellington returned to the Cotton Club which had relocated to the mid-town Theater District. In the summer of that year, his father died, and due to many expenses, Ellington's finances were tight, although his situation improved the following year. After leaving agent Irving Mills, he signed on with the William Morris Agency. Mills though continued to record Ellington. After only a year, his Master and Variety labels, the small groups had recorded for the latter, collapsed in late 1937, Mills placed Ellington back on Brunswick and those small group units on Vocalion through to 1940. Well known sides continued to be recorded, "Caravan" in 1937, and "I Let a Song Go Out of My Heart" the following year. Billy Strayhorn, originally hired as a lyricist, began his association with Ellington in 1939. Nicknamed "Swee' Pea" for his mild manner, Strayhorn soon became a vital member of the Ellington organization. Ellington showed great fondness for Strayhorn and never failed to speak glowingly of the man and their collaborative working relationship, "my right arm, my left arm, all the eyes in the back of my head, my brain waves in his head, and his in mine". Strayhorn, with his training in classical music, not only contributed his original lyrics and music, but also arranged and polished many of Ellington's works, becoming a second Ellington or "Duke's doppelganger". It was not uncommon for Strayhorn to fill in for Duke, whether in conducting or rehearsing the band, playing the piano, on stage, and in the recording studio. The 1930s ended with a very successful European tour just as World War II loomed in Europe.
Question: Any other aspects of his career happen during this time frame?
Answer:
Billy Strayhorn, originally hired as a lyricist, began his association with Ellington in 1939.