When did Steven Spielberg produce his fourth movie?
2006
1991
1991
1991
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1983
1991
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1979
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2001
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1979
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1979
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1989
1977
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2001
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2001
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2001
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1979
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1977
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2001
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1979
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1983
1991
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1997
1990
1989
1977
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1995
1984
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2001
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1993
2005
1979
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1983
1991
1985
1996
1992
1997
1990
1989
1977
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1995
1984
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2001
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2005
1979
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1983
1991
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1977
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1984
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2001
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2005
1979
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1981
1991
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1977
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1984
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1987
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1979
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1991.
2001.