[['manufacturer', 'model', 'quantity', 'introduced', 'retired'], ['douglas', 'c - 54 skymaster', '6', '1947', '1966'], ['douglas', 'c - 47 dakota', '2', '1947', '1964'], ['de havilland', 'dh114 heron', '7', '1952', '1960'], ['fokker', 'f - 27 friendship', '8', '1958', '1977'], ['douglas', 'dc - 6a / c', '1', '1961', '1965'], ['douglas', 'dc - 6b', '7', '1962', '1973'], ['fokker', 'f - 28 fellowship', '6', '1969', '1986'], ['boeing', '737 - 200', '20', '1969', '1994'], ['boeing', '767 - 200', '2', '1984', '1986'], ['boeing', '737 - 400', '7', '1989', '2004'], ['boeing', '737 - 500', '17', '1990', '2004'], ['fokker', '100', '5', '1997', '1999'], ['boeing', '737 - 300', '1', '1997', '1999'], ['boeing', '737 - 700', '13', '1998', '2004'], ['british aerospace', '146200', '10', '1998', '2001']]
all Douglas manufactured aircraft have been Retired before the 2000 's
all [ENT] manufactured aircraft have been [ENT] before the 2000 's