Question: Cheburashka is voiced by a Soviet and Russian actress and singer who was active from 1951 until what year?

full_context: Document 1: Gena the Crocodile (film): Gena the Crocodile (Russian: Крокодил Гена , "Krokodil Gena " ) is a 1969 Soviet/Russian stop-motion animated film directed by Roman Kachanov in Soyuzmultfilm studio. This film introduces the characters Gena the Crocodile, Cheburashka, and the old woman Shapoklyak. The film was based on Eduard Uspensky's stories about the characters.
Document 2: Cheburashka: Cheburashka (Russian: Чебура́шка ; ] ), also known as Topple in earlier English translations, is a character in children's literature, from a 1966 story by Soviet writer Eduard Uspensky. He is also the protagonist (voiced by Klara Rumyanova) of the stop-motion animated films by Roman Kachanov (Soyuzmultfilm studio), the first film of which was made in 1969.
Document 3: Natalya Belokhvostikova: Natalya Nikolayevna Belokhvostikova (Russian: Ната́лья Никола́евна Белохво́стикова , July 28, 1951, Moscow, USSR) is a retired Soviet and Russian actress.
Document 4: Nadezhda Lamanova: Until the Russian Revolution, Lamanova held a title of supplier of Her Majesty's Imperial Court. Lamanova created gowns for the Empress Alexandra Feodorovna. After the Revolution, Lamanova was the only renowned designer to stay in Russia and lay the basis for the new Soviet fashion. In cooperation with Russian artist and sculptor Vera Mukhina Lamanova won the Grand-prix at the International Exposition of 1925 in Paris.
Document 5: Alla Pugacheva: Alla Borisovna Pugacheva (Russian: Алла Борисовна Пугачёва ; sometimes transcribed in English as Pugachova, ] ; born 15 April 1949), is а Soviet and Russian musical performer. Her career started in 1965 and continues to this day. For her "clear mezzo-soprano and a full display of sincere emotions", she enjoys an iconic status across the former Soviet Union as the most successful Soviet performer in terms of record sales and popularity.
Document 6: Roman Abelevich Kachanov: Roman Abelevich Kachanov (Russian: Роман Абелевич Качанов ; 25 February 1921 – 4 July 1993) was a Soviet animator who worked primarily in the stop-motion animation technique. He directed the popular series of films about Cheburashka based on the fairy tales written by Eduard Uspensky: "Gena the Crocodile", "Cheburashka", "Shapoklyak" and "Cheburashka Goes to School".
Document 7: Ava Gardner: Ava Lavinia Gardner (December 24, 1922 – January 25, 1990) was an American actress and singer.
Document 8: Cheburashka Goes to School: Cheburashka Goes to School (Russian: Чебурашка идёт в школу, Cheburashka Idet v Shkolu ) is a 1983 Soviet animated film directed by Roman Kachanov.
Document 9: Lada Negrul: Lada Negrul, (Russian: Лада Негруль , born April 18, 1972) is a Russian actress and poet. She works in Moscow "Russian House" theater and played main roles in ten Russian movies, including a TV serial "Dirty Work". She is author and producer of documentaries about Irina Skobtseva, Sergei Bondarchuk, and Vladislav Galkin. Lada Negrul published four books of her poetry and a book about Alexander Men. She also performs sound poetry and songs by Alexander Galich and Vladimir Vysotsky
Document 10: Vladimir Vysotsky: Vladimir Semyonovich Vysotsky (Russian: Влади́мир Семёнович Высо́цкий ; ] ; 25 January 1938 – 25 July 1980) was a Russian singer-songwriter, poet, and actor whose career had an immense and enduring effect on Soviet and Russian culture. He became widely known for his unique singing style and for his lyrics, which featured social and political commentary in often humorous street jargon. He was also a prominent stage and screen actor. Though his work was largely ignored by the official Soviet cultural establishment, he achieved remarkable fame during his lifetime, and to this day exerts significant influence on many of Russia's popular musicians and actors who wish to emulate his iconic status.
Document 11: Cheburashka (film): Cheburashka (Russian: Чебурашка , "Cheburashka " ) is a 1972 Soviet/Russian animated film directed by Roman Kachanov.
Document 12: Klara Rumyanova: Klara Mikhailovna Rumyanova (Russian: Кла́ра Миха́йловна Румя́нова ; 8 December 1929, Leningrad – 18 September 2004, Moscow) was a Soviet and Russian actress and singer. She was active from 1951 to 1999.
Document 13: Klavdiya Kalugina: Klavdiya Kalugina (born 1926) was a Soviet sniper in the Second World War. She joined the Communist Youth league Komsomol in 1943 where she qualified as a sniper. She entered active service at age 17 in March 1944, fighting on the 3rd Belorussian Front as one of the youngest women snipers. She has 257 confirmed kills.
Document 14: Karlsson-on-the-Roof: Karlsson-on-the-Roof (Swedish: "Karlsson på taket") is a character who figures in a series of children's books by the Swedish author Astrid Lindgren. A cartoon adaptation of the series became popular in the Soviet Union when it was released in the 1970s. These adaptations are still celebrated to this day as an integral part of the Russian cartoon industry. Karlsson, together with Cheburashka and other such characters, are recognized as a national icon. Lindgren may have borrowed the idea for the series from a similar story about Mr. O'Malley in the comic strip "Barnaby" (1942) by Crockett Johnson.
Document 15: Vaniusha The Newcomer: Vaniusha The Newcomer (Russian: Пришелец Ванюша ) is a 1990 Soviet Russian stop-motion animation film by Vladimir Danilevich and Olga Panokina. It was produced by Soyuzmultfilm studio. <br>The film is about The Friendly Newcomer from another planet.<br> It is the second film of the tetralogy, which tells about the adventures of The Newcomer Vaniusha and his friends. The other three films are "The Newcomer in The Cabbage", "Vaniusha and The Space Pirate" and "Vaniusha and The Giant".
ground_truth: 1999