The Norwegian Newspaper Corpus is a large and self-expanding corpus of Norwegian newspaper texts. The collection of this dynamic and continually growing corpus began in 1998.
It began in the year 1990+8
1990+8=1998, the year that it was said to began, I believe the model got confused because of the math.
( z1 begin :ARG1 ( z2 it ) :time ( z3 date-entity :year 1990 :month 6 :day 8 ) )