Snowboarder going down a fresh hill.
The Snowboarder is competing in a snowboard race in December
Snowboarding does not imply that a person is competing in a snowboard race nor that it is the month of December.
exists e1 s1 s2 x1 x2.(ne_nam_snowboarder(x1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_hill(x2) & a_fresh(s1) & Theme(s1,x2))
exists e1 x1 x2 x3 x4.(n_date(x4) & a_date_month_12(x4) & a_date_month_12(x4) & ne_nam_snowboarder(x1) & in(e1,x4) & in(e1,x2) & n_race(x2) & of(x2,x3) & n_snowboard(x3) & Actor(e1,x1) & v_compete(e1))