A young boy opens his Christmas presents.
It's Christmas day.
The boy is not necessarily opening his Christmas presents on Christmas Day.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_open(e1) & n_present(x2) & (x2 = x3) & ne_nam_christmas(x3) & of(x2,x1) & n_male(x1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists p1 x1.(n_thing(x1) & exists x2 x3.((x1 = x2) & n_day(x2) & (x2 = x3) & ne_tim_christmas(x3)))