The keyboard is white
The computer tower is beige, and probably from the late 1980s.
The color can either be white or beige.
exists s1 x1.(n_keyboard(x1) & Theme(s1,x1) & a_white(s1))
exists s1 s2 s3 x1 x2 x3 x4.(n_date(x4) & a_date_year_198X(x4) & a_date_year_198X(x4) & a_late(s3) & Theme(s3,x4) & n_tower(x1) & of(x1,x3) & n_computer(x3) & of(x1,x2) & n_computer(x2) & from(s2,x4) & Theme(s2,x1) & a_probably(s2) & Theme(s1,x1) & a_beige(s1))