Years Years are normally expressed in digits ; a comma is not used in four-digit years -LRB- , not -RRB- .

Years Years are normally expressed in digits -LRB- `` NUMBER@1 '' , not `` Nineteen eighty-eight '' -RRB- ; a comma is not used in four-digit years -LRB- not `` NUMBER@2 '' -RRB- .
