81.   And it could take several years for large airlines to equip their entire fleets.

82.   And it takes years to learn how to maneuver them.

83.   And he predicted that it would take years, if not decades, to change.

84.   And if data is encrypted, it can take years to crack.

85.   And more advanced courses take years to complete.

86.   And should a scientific review be conducted, it could take years, dragging on through administrative proceedings or in court.

87.   And the people who work on these assembly lines can take a year to three years to train.

88.   And like some drug complications, ecological side-effects may take years to appear.

89.   And some take a year off between pictures.

90.   And that may take years.