When did Steven Spielberg produce his first movie?
1991
1977
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1982
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1976
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1971
1990
1981
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1987
1974
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1973
1977
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1982
1984
1976
1978
1975
1971
1990
1981
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1987
1974
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1973
1977
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1982
1984
1976
1978
1975
1971
1990
1981
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1980
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1987
1974
1972
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1973
1970
1989
1977
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1982
1984
1988
1976
1978
1975
1971
1990
1981
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1987
1974
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1989
1977
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1976
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1987
1974
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1989
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1992
1982
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1988
1976
1991
1978
1975
1971
1990
1981
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1980
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1987
1974
1972
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1973
1970
1989